Download TRF6901 with MSP430 Demonstration and

TRF6901
with MSP430 Demonstration and Development
Evaluation Kit
User’s Guide
June 2004
Digital Radio RF Group
SLWU008B
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Preface
Read This First
About This Manual
This document presents the contents of the TRF6901 demonstration and
development tool kit. The user’s manual provides a thorough
understanding on how to operate the MSP-TRF6901-DEMO kit and
provides a detailed description of its hardware and software. Some level of
product understanding regarding the MSP430F449 and the TRF6901 is
required to obtain the full benefit of this user’s guide.
How to Use This Manual
Different topics covered in this manual may require different levels of
expertise. If this is the first time you are using the MSP-TRF6901-DEMO
kit, you should start with the first three Chapters. Chapter 1, TRF6901
Demonstration and Development Kit Overview, provides a general
overview of the kit. Chapter 2, Demonstrating, and Chapter 3, Prototyping
are focused on how to operate the kit.
If your ultimate goal is to prototype with this kit, you should then review, in
detail, Chapter 4, PCB Hardware Overview and Chapter 5, Software
Overview, to get an understanding on how the wireless bidirectional link
demonstration works. These two chapters cover hardware and software
ideas that you may require some additional level of expertise.
Notational Conventions
ACK
Acknowledgement packet
JTAG
Scan-based embedded system emulation
MSP-TRF6901-DEMO TRF6901 demonstration and development kit
RF
Radio frequency
RSSI
Receive signal strength indicator
Information About Cautions and Warnings
This book may contain cautions and warnings.
iii
Related Documentation From Texas Instruments
This is an example of a caution statement.
CAUTION
A caution statement describes a situation that could potentially
damage your software or equipment.
This is an example of a warning statement.
WARNING
A warning statement describes a situation that could potentially
cause harm to you.
The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.
Related Documentation From Texas Instruments
Other related documents that may be helpful are:
❏
TRF6901 datasheet - http://focus.ti.com/lit/ds/symlink/trf6901.pdf
❏
MSP430F449 data sheet http://focus.ti.com/lit/ds/symlink/msp430f449.pdf
❏
TRF6901 design guide - http://focus.ti.com/lit/an/swra035/swra035.pdf
❏
TRF6901 FAQ - http://focus.ti.com/lit/misc/slad008/slad008.pdf
If You Need Assistance
For more design and product information related to the TRF6901 and the
MSP430 go to the following two web sites:
iv
❏
http://www.msp430.com
❏
http://www.ti.com/ismrf
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to
subpart J of part 15 of FCC rules, which are designed to provide
reasonable protection against radio frequency interference. Operation of
this equipment in other environments may cause interference with radio
communications, in which case the user at their own expense will be
required to take whatever measures may be required to correct this
interference.
Disclaimer
Please note that the enclosed demonstration boards are experimental
printed circuit boards and are therefore only intended for device evaluation
We would like to draw your attention to the fact that these boards have
been processed through one or more of Texas Instruments’ external
subcontractors which have not been production qualified. Device
parameters measured, using these boards, are not representative of any
final data sheet or of a final production version. Texas Instruments does
not represent or guarantee that a final version will be made available after
device evaluation.
THE DEMONSTRATION BOARDS ARE SUPPLIED WITHOUT
WARRANTY OF ANY KIND, EXPRESSED, IMPLIED OR STATUATORY,
INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
TEXAS INSTRUMENTS ACCEPTS NO LIABILITY WHATSOEVER
ARISING AS A RESULT OF THE USE OF THESE BOARDS.
The fee associated with the demonstration boards is a partial nonrecurring
engineering fee (NRE) to partially defray the engineering costs associated
with the board development and applications support for the RF integrated
semiconductor product. The demonstration board is a tool for
demonstrating and evaluating the RF semiconductors supplied by Texas
Instruments. The demonstration board is supplied to prospect component
customers to provide services and software allowing the prospect
customers to evaluate the RF semiconductors in products they would build.
The demonstration board may be operated only for product demonstration
or evaluation purposes and then only in nonresidential areas. Texas
Instruments understanding is that the customers’ products using the RF
parts listed shall be designed to comply with all applicable FCC and
appropriate regulatory agency requirements and will, upon testing, comply
with these requirements. Operation of this device is subject to the
conditions that it does not cause harmful interference and that it must
accept any interference.
Contents
1
2
TRF6901 Demonstration and Development Kit Overview ...................................1-1
1.1 Description.........................................................................................................1-2
1.2 Contents ............................................................................................................1-2
1.3 Equipment Requirement....................................................................................1-2
Demonstrating .........................................................................................................2-1
2.1 Board Description ..............................................................................................2-2
2.2 Operation...........................................................................................................2-3
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
3
4
Prototyping ..............................................................................................................3-1
3.1 Connections to the MSP430 JTAG ....................................................................3-2
3.2 Loading the MSP430 With the Firmware...........................................................3-2
PCB Hardware Overview ........................................................................................4-1
4.1 Hardware Overview ...........................................................................................4-2
4.2 TRF6901 RF Block Diagram .............................................................................4-2
4.3 MSP430F449 Block Diagram ............................................................................4-2
4.4 Demo Board Schematics...................................................................................4-3
4.5 Top and Bottom Silk Screen and Drawing.........................................................4-3
4.6 Parts List............................................................................................................4-5
4.7 Alternate Hardware Configurations ...................................................................4-6
4.7.1
4.7.2
4.7.3
4.7.4
4.7.5
4.7.6
4.7.7
5
Getting Ready .................................................................................................... 2-4
Power Up ........................................................................................................... 2-4
Wireless Demonstration..................................................................................... 2-5
RSSI Indicator.................................................................................................... 2-5
Error Conditions ................................................................................................. 2-5
European ISM-Band .......................................................................................... 4-6
External Antenna ............................................................................................... 4-6
RS-232C Port..................................................................................................... 4-7
On-Board LDO Regulator .................................................................................. 4-7
High-Frequency Cystal ...................................................................................... 4-7
SAW Filter ..........................................................................................................4-7
MSP430 Disable ................................................................................................ 4-8
Software Overview ..................................................................................................5-1
5.1 Software Description .........................................................................................5-2
5.2 Flowchart ...........................................................................................................5-2
5.3 Wireless Protocol Architecture ..........................................................................5-3
5.3.1
5.3.2
5.3.3
5.3.4
Preamble............................................................................................................ 5-3
Packet Start and Word-Synch-Bits .................................................................... 5-3
Wireless Data Stream ........................................................................................ 5-3
Checksum Byte.................................................................................................. 5-4
5.4 TRF6901 Registers ...........................................................................................5-4
5.5 Wireless Subroutines.........................................................................................5-5
5.5.1
5.5.2
5.5.3
program_trf69() .................................................................................................. 5-5
receive_RF(unsigned char, unsigned int*)......................................................... 5-6
send_RF(unsigned int, unsigned int*)................................................................ 5-6
vi
Figures
2-1. Top-Side and Back-Side Picture of the Demonstration Board ............................ 2-2
3-1. JTAG Connector ...................................................................................................... 3-2
4-1. TRF6901 Block Diagram.......................................................................................... 4-2
4-2. Block Diagram of the MSP430F44x........................................................................ 4-3
4-3. Top-Side Silk Screen ............................................................................................... 4-3
4-4. Bottom-Side Silk Screen ......................................................................................... 4-4
4-5. JP1 Pin-Out Configuration...................................................................................... 4-7
5-1. Game Application State Machine Architecture ..................................................... 5-2
5-2. Communication Protocol ........................................................................................ 5-3
5-3. 6-Byte Transmission Data Packet .......................................................................... 5-4
5-4. 4-Byte ACK Packet .................................................................................................. 5-4
Tables
2-1. 4-bit DIP Switch (SW1) Frequency Configuration................................................. 2-4
4-1. Antenna Suppliers ................................................................................................... 4-7
5-1. TRF6901 Game Application Register Values ........................................................ 5-5
vii
Chapter 1
TRF6901 Demonstration and
Development Kit Overview
This chapter provides an overview of the TRF6901 demonstration and
development kit.
Topic
Page
1.1 Description.................................................................................................1-2
1.2 Contents.....................................................................................................1-2
1.3 Equipment Requirements .........................................................................1-2
1-1
TRF6901 Demonstration and Development Kit Overview
1.1 Description
The MSP-TRF6901-DEMO kit is used to demonstrate a bidirectional RF
(radio frequency) link without the need of a personal computer and to
prototype by downloading new software code to the MSP430F449 using a
JTAG connector. The schematics and layout of the board can be used as a
reference design if desired, limited by the software system parameters
provided for the demonstration.
1.2 Contents
Contained within the TRF6901 demonstration and development kit are the
following:
❏
Two TRF6901 demonstration boards
❏
This user’s guide
Software code is not included in the kit. Software and hardware
documentation related to this kit can be downloaded at:
http://www.ti.com/ismrf
1.3 Equipment Requirement
The following equipment is not included in this kit and is required to
operate the MSP-TRF6901-DEMO kit:
1-2
❏
Four (4) AAA batteries
❏
MSP430 bus expansion cable for the JTAG connector, required only
for prototyping purposes
Chapter 2
Demonstrating
This chapter explains how to operate the MSP-TRF6901-DEMO kit to
demonstrate a RF bidirectional link
Topic
Page
2.1 Board Description .....................................................................................2-2
2.2 Operation ...................................................................................................2-3
2-1
Demonstrating
2.1 Board Description
The two boards that you have received with your kit are identical. Each unit
has a TRF6901 single-IC RF transceiver and a MSP430F449 microcontroller. Each board is capable of sending and receiving half-duplex
wireless data on the European and US ISM bands. The boards are preconfigured to use the 902 to 928 MHz ISM band out of the box. Figure 2-1
shows a top-side and back-side picture of each board.
Figure 2-1. Top-Side and Back-Side Picture of the Demonstration Board
2-2
Demonstrating
Each board features the following functions:
a) On/Off switch
b) Battery holder: stores two AAA batteries in series (batteries are not
included)
c) MSP430 headers: used to access the I/O ports of the
MSP430F449
d) TRF6901 component
e) Antenna selection jumper used to select either the SMA connector
or PCB antenna.
f)
On board PCB antenna (default configuration)
g) SMA footprint connector used to add an external antenna (SMA
connector not included)
h) 4-bit DIP switch used in the demonstration to change the
frequency configuration. The MSP430 I/O ports P2.3, P2.6, P2.7,
and P3.0 connect to the 4-bit DIP switch.
i)
Receive signal strength indicator (RSSI) LEDs – used as the RSSI
for the demonstration. The LEDs are tied to the MSP430 P6.0 to
P6.3 I/O ports.
j)
Four buttons used for the demonstration application; connected to
the MSP430 P1.0 to P1.3 I/O ports.
k) Four LEDs used for the demonstration application; connected to
the MSP430 P1.3 to P1.7 I/O ports.
l)
RS-232C connector footprint (RS-232C circuitry is not included in
the kit)
m) JTAG connector
n) TRF6901 I/O header used to control or monitor the TRF6901
component externally.
o) MSP430 disable jumper used to disable the MSP430F449
component
p) MSP430F449 component
2.2 Operation
A simple game is implemented in the firmware to demonstrate bidirectional
RF communication. The transmit side initiates the game by pushing any
sequence of four buttons. The user on the receive side responds by
pushing the same button sequence. After a complete roundtrip, the
transmit side illuminates one of three LEDs depending on the feedback
provided by the receiving board:
❏
Successful user response and communication. The green LED
illuminates if the packet was delivered to the receiving board and the
user on the receiving board pressed the correct sequence of buttons.
❏
Successful communication and user error. The orange LED illuminates
if the packet was delivered to the receiving board and the user on the
receiving board pressed the incorrect sequence of buttons.
❏
Communication error. The red LED illuminates if there was a
communication error.
2-3
Demonstrating
2.2.1
Getting Ready
Before you start operating the units as a demonstration make sure that you
have done the following:
❏
Slide the on/off switch to off
❏
Place two AAA batteries on each demonstration board
❏
Have the same 4-bit DIP switch (SW1) configuration on both boards
See Table 2-1 for a list of the US ISM band frequencies supported using
the 4-bit DIP switch (SW1). It does not matter what 4-bit DIP switch setting
you choose to operate the demo, as long as both boards have the same
configuration.
Table 2-1. 4-bit DIP Switch (SW1) Frequency Configuration
2.2.2
1234 SW1 setting (1=On, 0=Off)
0000
Frequency (MHz)
902
0001
903
0010
904
0011
905
0100
906
0101
907
0110
908
0111
909
1000
910
1001
911
1010
912
1011
913
1100
914
1101
915
1110
916
1111
917
Power Up
Slide the power switch to ON. All the LEDs should blink to indicate power
up condition. After the power up initialization, both units go into receive
mode to monitor for any activities. The RSSI indicator LED is lit up to
indicate the signal strength in the frequency of operation. Red indicates the
lowest signal strength while green indicates the highest.
2-4
Demonstrating
2.2.3
Wireless Demonstration
Either board can initiate a wireless communication. For explanation
purposes, call Board-A the board that you use to transmit the first fourbutton sequence and Board-B the board that you are using to receive the
first four-button transmission.
Use Board-A to start the wireless demonstration by pressing any
sequence of four buttons with about 1/2 second in between. Once the four
buttons are pushed, Board-A initiates the transmission, and waits for a
reply.
Once the transmission is received by Board-B, the LEDs are turned on in
the same sequence as the buttons were pushed at the transmitter side.
Immediately after the last LED is displayed, respond by pushing the
buttons in the exact sequence that the LED is displayed on Board-B.
If the response sequence matches, the green LED on Board A lights up. If
there are errors due to bad transmission, lost transmission, or not matching
response sequence, the red LED lights up. This completes the round trip
RF communication demonstration.
On completion, both boards go back to listen mode to accept a new
sequence.
2.2.4
RSSI Indicator
The boards are equipped with a receive signal strength indicator that will
illustrate the signal strength on the receiver. 4 levels are used to indicate
signal strength. Red is the lowest and means no signal received at all,
while green indicates the highest level of signal strength. The RSSI will
show transmission activity when the other board is transmitting a data
stream on the same DIP switch configuration or there is another external
source interfering with that channel.
2.2.5
Error Conditions
Cycle power the system to reinitialize the hardware if you get error
conditions that persist. Error conditions are defined as lost communication,
mismatch in response sequences, or response time outs.
2-5
Chapter 3
Prototyping
This chapter explains how to operate the MSP-TRF6901-DEMO kit
to prototype new applications
Topic
Page
3.1 Connecting to the MSP430 JTAG.............................................................3-2
3.2 Loading the MSP430 With the Firmware .................................................3-2
3-1
Prototyping
3.1 Connecting to the MSP430 JTAG
The MSP-TRF6901-DEMO is designed for rapid application development.
This is made possible by the MSP430 MCU with flash memory that can be
erased and programmed several times. Additionally, the on-chip emulation
logic allows real-time debugging and fast code development.
BEFORE CONNECTING TO THE MSP430 JTAG, THE 2 AAA
BATTERIES MUST BE REMOVED OR THE ON-OFF SWITCH MUST BE
IN THE OFF POSITION.
Connector J2 provides access to the JTAG port of the MSP430 device in
the MSP-TRF6901-DEMO kit. The MSP-FET430 flash emulation tool
interface board MSP-FETP430IF (not included in this kit) connects to J2
and allows real-time in-system emulation. Programming the MSP430,
assembler/ C-source level debug, single stepping, multiple hardware
breakpoints, full-speed operation and peripheral access are fully supported
in-system using the JTAG. The MSP-TRF6901-DEMO and the MSP430
Flash Emulation Tool (FET) provide everything that is required to develop
an entire project. Figure 3-1 shows the connections of the MSP-TRF6901DEMO to the JTAG cable provided by the MSP430 FET interface board.
Figure -3-1. JTAG Connector
Dented
Side
Red
3.2 Loading the MSP430 With the Firmware
The MSP-TRF6901-DEMO comes with complete source code to program
the MSP430 to run the demo program. The user can develop new
application software that can be downloaded to the MSP430 MCU using
the JTAG connector. For practical purposes, the following procedure
illustrates how to download the demo source code to the MSP430.
The project file for compiling the demo source code is trf6901_demo.prj.
The following steps show how to open this project and program the
MSP430:
3-2
Prototyping
Step 1. Remove the two AAA batteries or slide the On/Off switch to Off.
Step 2. Start the Workbench (START->PROGRAMS->IAR SYSTEMS>IAR EMBEDDED WORKBENCH.
Step 3. Use FILE->OPEN to open the project file at:
root>\…\ trf6901_demo.prj.
<Installation
Step 4. Use PROJECT->BUILD ALL to compile and link the source code.
You can view the source code by double-clicking Common
Sources, and then double-clicking on the source files in the
trf6901_demo.prj window.
Step 5. Ensure that C-SPY is properly configured (With DEBUG selected,
PROJECT->OPTIONS->C-SPY); 1. PARALLEL PORT>PARALLEL PORT->LPT1 (default) or LPT2 or LPT3
Step 6. Use PROJECT->DEBUGGER to start C-SPY. C-SPY erases the
device Flash, and then download to the device Flash the
application object file.
Step 7. In C-SPY, use EXECUTE->GO to start the application.
Step 8. In C-SPY, use FILE->EXIT to exit C-SPY.
Step 9. In the Workbench, use FILE->EXIT to exit the Workbench.
The MSP430 is now programmed with the demo code and ready to
operate.
3-3
Chapter 4
PCB Hardware Overview
This chapter provides the default PCB hardware documentation in detail
and provides alternate configurations that the user may want to implement.
Topic
Page
4.1 Hardware Overview ...................................................................................4-2
4.2TRF6901 RF Block Diagram.......................................................................4-2
4.3 MSP430F449 Block Diagram ....................................................................4-2
4.4 Demo Board Schematics ..........................................................................4-3
4.5 Top and Bottom Silkscreen and Drawings..............................................4-3
4.6 Parts List ....................................................................................................4-5
4.7 Alternate Hardware Configurations .........................................................4-6
4-1
PCB Hardware Overview
4.1 Hardware Overview
The TRF6901 ISM-band transceiver IC operates from 860 MHz to
930 MHz. It has low power consumption and an operating voltage of 1.8 V
to 3.6 V. It uses an integer-N synthesizer and supports FSK operation.
Other features include an on-chip reference oscillator, phase lock loop,
brownout detector, and XTAL software trimming.
The TRF6901 demonstration and development kit (MSP-TRF6901-DEMO)
provides a stand alone demonstration of a bidirectional link using the
MSP430F449 and the TRF6901
4.2 TRF6901 RF Block Diagram
Figure 4-1 shows the block diagram of the TRF6901 ISM transceiver IC.
Figure 4-1. TRF6901 Block Diagram
4.3 MSP430F449 Block Diagram
Figure 4-2 shows the block diagram of the MSP430F449 microcontroller
IC.
4-2
PCB Hardware Overview
Figure 4-2. Block Diagram of the MSP430F44x
4.4 Demo Board Schematics
All the schematics for the demonstration boards can be found at
http://www-s.ti.com/sc/techzip/slwc036.zip.
4.5 Top and Bottom Silk Screen and Drawing
Figure 4-3 shows the top-side silkscreen of the demo board and Figure 4-4
shows the bottom-side silkscreen.
Figure 4-3. Top-Side Silk Screen
4-3
PCB Hardware Overview
Figure 4-4. Bottom-Side Silk Screen
4-4
PCB Hardware Overview
4.6 Parts List
Item Qty
Value
Source
Part Number
MEMORY
PROTECTION
DEVICES
BC2AAAPC
Description
Reference
1
1
2
1
3
4
5
1
2
3
4.7pF
82pF
15pF
AVX
AVX
AVX
06035A4R7CAT2A
06035A820JAT2A
06035A150GAT2A
BATTERY HOLDER, 2 X AAA,
PCB MOUNT
CONN, COAX, SMA, EDGE, SMT,
0.062THK PCB
CAP, CER, 0603, 50V, +/-.25PF,
4.7PF
CAP, CER, 0603, 50V, 5%, 82PF
CAP, CER, 0603, 50V, 2%, 15PF
6
7
1
2
120pF
68pF
AVX
AVX
06035A121JAT2A
06035A680JAT2A
CAP, CER, 0603, 50V, 5%, 120PF C6
CAP, CER, 0603, 50V, 5%, 68PF C7,C17
8
1
22pF
AVX
06035A220FAT2A
9
2
2.7pF
AVX
06035A2R7CAT2A
CAP, CER, 0603, 50V, 1% , 22PF C9
CAP, CER, 0603, 50V, +/-.25PF,
2.7PF
C11,C10
10
2
100pF
AVX
06035A101FAT2A
11
1
2200pF
AVX
06035A222JAT2A
12
1
2.2pF
AVX
06035A2R2CAT2A
13
1
150pF
AVX
06035A151FAT2A
14
3
1000pF
AVX
15
BAT 2 CELL
24 .1uF
AVX
16
1
.01uF
AVX
17
1
0.5pF
AVX
18
4
1.0uF
KEMET
19
4
22uF
CAL CHIP
20
2
10pF
AVX
21
2
RED
LITEON
22
2
YEL
LITEON
23
2
ORN
LITEON
24
2
GRN
LITEON
25
1
MBRM120LT3
MOTOROLA
26
1
SFECV10.7MS2S-A MURATA
27
28
1
1
47nH
HEADER 7X2
MURATA
SAMTEC
29
2
4.7uH
MURATA
30
1
8.2nH
MURATA
31
1
10nH
MURATA
32
33
34
1
6
1
6.8nH
0
220K
MURATA
AVX
35
36
37
38
9
1
1
1
10K
6.8K
18K
1K
39
40
8
1
100
82K
BAT1
CO1
C2
C3,C5
C18,C4,C8
CAP, CER, 0603, 50V, 1%, 100PF C20,C54
CAP, CER, 0603, 50V, 5%,
2200PF
C13
CAP, CER, 0603, 50V, +/-.25PF,
2.2PF
C14
CAP, CER, 0603, 50V, 1%, 150PF C15
CAP, CER, 0603, 50V, 5%,
06035A102JAT2A
1000PF
C16,C21,C39
C19,C23,C30,C31,C33,C34,C
37,C40,C41,C43,C44,C45,C4
6,C48,C49,C50,C51,C52,C53,
CAP, CER, 0603, 16V, 10%,
C55,C56,C57,C58,C59
0603YC104KAT2A
0.1UF
CAP, CER, 0603, 50V, 10%,
06035C103KAT2A
0.01UF
C22
CAP, CER, 0603, 50V, +/-.25PF,
06035A0R5CAT2A
0.5PF
C24
CAP, TANT, 3216, 16V, 10%,
T491A105K016AS
1.0UF
C26,C27,C28,C29
CAP, CER, 1210, 16V, -20 +80%,
GMC32Z5U226Z16NT 22UF
C32,C42,C47,C60
CAP, CER, 0603, 50V, +/-.5PF,
06035A100DAT2A
10PF
C36,C35
DIODE, LED, T1, RED, 12.5MCD
LTL-4222N
@ 20MA
D8,D1
DIODE, LED, T1, YEL, 12.5MCD
LTL-4252N
@ 20MA
D2,D4
DIODE, LED, T1, ORN, 12.5MCD
LTL-4296N
@ 20MA
D7,D3
DIODE, LED, T1, GRN, 12.5MCD
LTL-4232N
@ 20MA
D6,D5
DIODE, SCHOTTKY, 20PIV,1A,
MBRM120LT3
DO-216AA
D9
SFECV10.7MS2S-A- FILTER, BP, SMT, 10.7000MHZ
TC
CEN, 230KHZ BW
FL1
IND, SMD, 0603 +/- 2%, 380mA,
LQW1608A47NG00
47nH
JP1
TSW-107-07-T-D
CONN, HDR, P, 14, 7X2X0.1, TTH J2
IND, SMD, 0805, 30%, 30mA,
LQG21C4R7N00T1
4.7UH
L2,L1
IND, SMD, 0603, +/- .5nH, 650mA,
LQW1608A8N2D00
8.2nH
L3
IND, SMD, 0603, +/- 2%, 650mA,
LQW1608A10NG00
10nH
L4
IND, SMD, 0603, +/- .5nH, ?mA,
LQW1608A6N8D00
6.8nH
L5
CJ10-000-T
RES, 0603, 5%, 0 OHM
R6,R29,R31,R34,R41,R42
RES, 0603, 5%, 220K OHM
R7
R13,R14,R15,R16,R17,R18,R
RES, 0603, 5%, 10K OHM
19,R20,R33
RES, 0603, 5%, 6.8K OHM
R9
RES, 0603, 5%, 18K OHM
R10
RES, 0603, 5%, 1K OHM
R11
R21,R22,R23,R24,R25,R26,
RES, 0603, 5%, 100 OHM
R27, R28
RES, 0603, 5%, 82K OHM
R30
4-5
PCB Hardware Overview
41
42
8
1
10
1
RES, 0603, 5%, 10 OHM
RES, 0603, 5%, 1 OHM
SW, DIP, 4 X SPST, 24V @ 25mA,
TTH
SW, PB-SPST, NO, 50MA, 24V,
TTH
47
1
A6E-4104
OMRON
A6E-4104
48
4
PB SPST, NO
OMRON
B3W-4050S
49
1
EG1218
E-SWITCH
EG1218
50
1
TRF6901PT
TI
TRF6901PT
51
1
MSP430F449
TI
52
1
10.700MHZ
MURATA
MSP430F4449IPZ
CDSCA10M7GA119R0
53
54
1
1
20.000MHZ
32.768KHZ
CAL CRYSTAL CCL-SM7
XTAL, SMT, 20.0000MHZ, LCC4LAB
20.00000MHZ J15F
7X5MM
CITIZEN
CM202-32.768KDZFT XTAL, SMT, 32.768KHZ, CM202
SW, SLIDE SPDT, PCB, [email protected]
IC, RF XCVR, 860-930MHZ,
FQFP48
IC, MICROCONTROLLER, MIXED
SIGNAL, 16-BIT RISC, 32KB
FLASH, FQFP100
CER DISCRIMINATOR, SMT,
10.700MHZ,
R32,R35,R36,R37,R38,R39,
R43,R44
R40
SW1
SW2,SW3,SW4,SW5
SW6
U1
U6
Y1
Y2
Y4
4.7 Alternate Hardware Configurations
The MSP-TRF6901-DEMO kit is preconfigured to function under the
following assumptions:
❏
US ISM-band
❏
NRZ (no return to zero)
❏
FSK (frequency shift keying)
❏
38.4K bps
❏
On-board PCB antenna
The kit can cover some limited alternate configurations. These options are
covered in this section.
4.7.1
European ISM-Band
European 868-MHz to 870-MHz ISM-band configuration is not covered in
the pre-configured system, but it can be modified by changing software
variables; the JTAG can download new software configurations. No
hardware changes are needed, but the antenna matching is not optimized
for this band. Go to www.ti.com/ismrf for more information on this option.
4.7.2
External Antenna
Significant range performance may be achieved when an external antenna
is used. The actual performance improvement will depend on the antenna
design and proper impedance matching. A solder pad for SMA connector is
designed into the board. The antenna can be mounted onto the SMA
connector. Jumper (JP1) setting must be moved to connect the external
antenna to the rest of the RF front end. Shorting pins 2 and 3 of JP1 with a
0-Ω resistor connects the internal antenna. To connect the external
antenna, open pins 2 and 3 and short pins 1 and 2 with a 0-Ω resistor.
Figure 4-5 shows the pin-out configuration at the silk screen. Table 4-1
provides some antenna supplier information.
4-6
PCB Hardware Overview
Figure 4-5. JP1 Pin-Out Configuration
2
3
1
Table 4-1. Antenna Suppliers
4.7.3
Supplier
MaxRad
Web Site
www.maxrad.com
Part number
MEXR902SM
ISM Band
US
Mobilemark
www.mobilemark.com
PSWN3-925S
PSTNS-900S
US
European
W. Badland Ltd. www.badland.co.uk
Various models
US / European
Radiall/Larsen
Various models
SPDA24832
US
European
www.radialllarsen.com
RS-232C Port
Provisions for communicating to the on-board processor through the
RS232 serial link are designed onto the board. Populate the appropriate
parts shown in the schematics for the physical link, including the Texas
Instruments MAX3232 component. The UART driver must be implemented
in firmware.
4.7.4
On-Board LDO Regulator
In normal operation, the battery voltage is directly connected to the power
input to the processor through R31. Provision for LDO usage is provided in
cases where higher voltage from an external supply is used instead of onboard battery. To add an LDO regulator, remove R31 and install U3 with a
Texas Instruments TPS76330DBV component. The boards are shipped
from factory with no installed LDO.
4.7.5
High-Frequency Crystal
The board has a foot print for high-frequency crystal operation (Y3) as well
as the low-frequency crystal operation. The factory default uses standard
32-kHz watch crystal (Y4) for low-frequency operation. Internal frequency
multiplier is used to generate system clock frequency of 2.4576 MHz.
4.7.6
SAW filter
A SAW filter is typically used to band-limit the received RF signal to reduce
the interference from RF energy in the frequency band other than the ISM
band. The SAW filter from Murata (SAFC915MA70N-TC11) gives a pass
band typical of 902 MHz to 928 MHz, while providing about 30 dB
attenuation at stop band. The part is also specified at ~4.5 dB signal loss in
4-7
PCB Hardware Overview
the pass band. This translates to corresponding loss in range of operation.
The SAW filter is not installed for the factory default to give optimum range
rather than optimum immunity. There are other cost-effective
implementations that address the same objective with lower dB signal loss.
4.7.7
MSP430 Disable
In normal operation, the MSP430 on-board processor controls the
TRF6901 component and the user interface. During evaluation, the RF
section can be driven directly by external control signals. This can be
accomplished by removing R42, which disables the voltage supply to the
MSP430 processor. The TRF6901 can then be accessed directly using the
TRF6901 header at J5.
4-8
Chapter 5
Software Overview
This chapter describes the software flow used for the demonstration
application that is preconfigured in each demonstration board.
Topic
Page
5.1 Software Description.................................................................................5-2
5.2 Flowchart ...................................................................................................5-2
5.3 Wireless Protocol Architecture ................................................................5-3
5.4 TRF6901 Registers ....................................................................................5-4
5.5 Wireless Subroutines................................................................................5-5
5 -1
5.1 Software Description
The software implements a simple game application demonstrating a
bidirectional wireless link. Each board comes with identical software. The
software was developed using IAR embedded workbench (www.iar.com).
Below is the software files used:
❏
trf6901_demo.prj – Project file
❏
trf6901_demo.c – main body of the program written in C languge. All
the subroutines are called from this program listing
❏
trf6901.s43 – assembly subroutine that is utilized to configure the
registers of the TRF6901 component
❏
radio01.s43 – assembly subroutines used to execute wireless
transmission and reception commands.
5.2 Flowchart
Upon power up initialization, a state machine is established to run the
demonstration function. Figure 5-1 illustrates the state machine flowchart.
Buttons and timer functions are handled through interrupt subroutines.
Figure 5-1. Game Application State Machine Architecture
Power
Up
Initalize
Received remote button packet
Receive_Normal
Local Button Activated
LED_Remote_Que
Local_Button_Active
Turn on LED
Wait_For_Local_
Button_Response
Response to Remote button complete
All 4 button pushed | 3 sec. timeout
Done
Receiver_Wating_For
_Response
All response button | 3 sec timeout
Local Button Initiated COM
Transmit_Packet
Received response packet | 5 second timed out
LED_Response
_Result
5-2
Software Overview
5.3 Wireless Protocol Architecture
The wireless data communication protocol is digital FSK at 38,400 bits per
second NRZ. The communication protocol used for the demonstration
board includes preamble, packet start bit, and word-synch-bit as illustrated
in Figure 5-2.
Figure 5-2. Communication Protocol
Pre-Amble
1
0
1
Bit Width = 26 us
Word0
Packet Start Bit
....
1
1
1
0
Word0 Synch Bit
Word1
.....
.....
0
Word1 Synch Bit
Communication Protocol
Preamble
The function of the preamble is to train the receive hardware to set the
proper threshold to extract 1 and 0 patterns. The preamble typically
consists of a train of alternating 1 and 0. A longer preamble may give better
performance at a cost of more time needed to deliver the equivalent
packet. For the current design, the preamble is 100 bits long, for 2.6-ms
duration. Shorter length may be used for more time critical requirements.
5.3.1
Packet Start and Word-Synch-Bits
The packet start bit and the word synch bit are used by the receive routine
to adjust timing for sampling the incoming data bit stream. The packet start
bit occurs once at the beginning of the valid data to indicate the start of the
data, and end of preamble. The synch bit is used to resynchronize the bit
stream and the data sampling timer. Over time the receive timing could
shift in phase relative to transmit timing due to the small variation in the
tolerances of the components. This shows up as an error in sampled data.
The problem gets worse as the packet size increases. Resynchronization
minimizes this drift over time.
Although resynchronization can be done at byte boundary, word boundary
resynchronization is slightly more efficient.
5.3.2
Wireless Data Stream
The wireless data stream implemented for the game application was
implemented as follows:
❏
User initiates an RF transmission on Board-A by pushing four buttons
in any sequence
❏
User sequence is sent to Board-B using the transmission data packet
described in Figure 5-3 embedded in the communication protocol
described in Figure 5-2. The transmission packet includes a header,
four bytes with the button IDs and a checksum
5-3
❏
Board-A goes to a wait state, where it waits to receive an
acknowledgement packet sent by the other board. The (ACK)
acknowledgement package is illustrated in Figure 5-4. The ACK
package is embedded in the protocol described in Figure 5-2. If BoardA does not get the ACK package in the preprogrammed waiting cycle,
then it retries for up to six times
❏
Note that each time that Board-B receives a transmission packet, it
acknowledges back to Board-A. Figure 5-4 illustrates the ACK packet.
Figure 5-3. 6-Byte Transmission Data Packet
Header
Byte
Button 1
Button 2
Button 3
Button 4
OxFE
ID Byte
ID Byte
ID Byte
ID Byte
0x06
0x06
0x06
Checksum
Byte
Figure 5-4. 4-Byte ACK Packet
0x06
5.3.3
Checksum Byte
Each packet has a checksum byte at the end of the data packet (see
Figure 5-3). The checksum byte is calculated by summing the first 5 bytes
of the packet and ignoring the overflow.
5.4 TRF6901 Registers
The TRF6901 needs to have its four (A thru D) registers initialized using
the serial port interface (SPI) so that it can operate as desired. Table 5-1
shows the values used on the four registers of the TRF6901 when the
program initializes.
5-4
Software Overview
Table 5-1. TRF6901 Game Application Register Values
Register
A
Parameter
PA attenuation
Mode 0
Charge Pump
DC/DC
Value
0 dB
Tx
0.5 mA
Off
B
PA attenuation
Mode 1
Modulation
Brownout Threshold
Brownout detector
0 dB
Rx
FSK
1.8 V
Off
C
Reference Divider
Reference Frequency
60
333.333 kHz
D
Crystal Tune
Reset Signal for PFD
20.23 pF
Derived From Prescaler
5.5 Wireless Subroutines
The game application uses C functions to address the different
communication tasks required to receive and send data. Read ahead for a
brief description of these subroutines.
5.5.1
program_trf69()
This function configures one of the four (A thru D) registers of the TRF6901
component. Here is a sample code on how to use this function so that you
can program all the four registers:
struct trf69_control{
unsigned int a_word_l, a_word_h, b_word_l, b_word_h;
unsigned int c_word_l, c_word_h, d_word_l, d_word_h;
}trf6901;
main()
{
unsigned long trf69;
int pointer;
trf69 = REGISTER_A; // REGISTER_A is a constant
trf6901.a_word_h = (unsigned int) (trf69>>16);
trf6901.a_word_l = (unsigned int) (trf69);
program_TRF69(trf6901.a_word_h,trf6901.a_word_l);
trf69 = REGISTER_B; // REGISTER_B is a constant */
trf6901.b_word_h = (unsigned int) (trf69>>16);
trf6901.b_word_l = (unsigned int) (trf69);
program_TRF69(trf6901.b_word_h,trf6901.b_word_l);
5-5
trf69 = REGISTER_C; // REGISTER_C is a constant */
trf6901.c_word_h = (unsigned int) (trf69>>16);
trf6901.c_word_l = (unsigned int) (trf69);
program_TRF69(trf6901.c_word_h,trf6901.c_word_l);
trf69 = REGISTER_D; // REGISTER_D is a constant */
trf6901.d_word_h = (unsigned int) (trf69>>16);
trf6901.d_word_l = (unsigned int) (trf69)
program_TRF69(trf6901.d_word_h,trf6901.d_word_l);
}
5.5.2
receive_RF(unsigned char, unsigned int*)
This function is used to receive a packet of wireless data stream. Here is
an example of how it is used:
struct RF_XMIT_PACKET {
int packetsize;
unsigned int xmit[MAXWORD];
unsigned int rcv[MAXWORD];
}buf;
Main()
{
int errorcode;
errorcode = receive_RF(buf.packetsize,buf.rcv);
// Packet stream stored in buf.rcv
// Packet size stored in buf.packetsize
}
5.5.3
send_RF(unsigned int, unsigned int*)
This function is used to transmit a packet of wireless data stream. Here is
an example on how it is used:
main()
{
buf.xmit[1]=ACK_CODE;
buf.xmit[0]=ACK_CODE;
ComFlag|=rf_X_buf_full;
send_RF(4,buf.xmit);
}
5-6
//enable transmitter
A
B
C
D
E
REVISIONS
ZONE
NONE
VCC
REV
A
DESCRIPTION
INITIAL RELEASE
DATE
3-31-03
APPROVED
RPW
R31
0
4
D9
SW6
BAT1
2 X AAA
PCB MT
+
-
BAT
1
2
1
2
MBRM120LT3
3
OPTIONAL LDO
REG
U3
BAT-SW2
BAT-SW
1
3
EG1218
+
2468
C42
22uF
-20+80%
16V
IN
5
OUT
3.0V@150mA
OPTIONAL,DNP
Y3
4
2
EN GND
TPS76330DBV
+
C32
22uF
-20+80%
16V
4.9152MHZ
C35
10pF
VCC
Y4
C36
10pF
VCC
XTAL2IN
VCC
R30
82K
RES IN FOR
NORTH AMERICA
R33
C37
C33
.1uF
C31
.1uF
.1uF
R34
RES IN FOR
EU RF BAND
C34
.1uF
R29
0
J2
RSSI
P6.6
P6.5
P6.4
P6LED3
P6LED2
P6LED1
P6LED0
VCC_CPU
.1uF
XTAL1IN
XTAL/TCLK
10K
VCC
C57
32.768KHZ
XTAK2OUT
0
TDO/TDI
TDI
TMS
TCK
1
3
5
7
9
11
13
/RST
VCC
R42
72
73
74
75
76
77
78
79
J1
U4
CONNECTOR DB9
5
C45
.1uF
1
6
C43
.1uF
T2IN
R2OTU
V+1
C2+
VCC
C1+
C2-
C1-
V-
GND
UTXD0
URXD0
10
9
VCC
Fsel4
P6LED[3-0]
3
C44
100
1
60
AVCC
DVCC1
DVCC2
9
8
XIN
XT2IN
XOUT/TCLK
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
VREF-
11
10
7
VeREF+
VREF+
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
R41
+
0
C47
22uF
-20+80%
16V
IO
VCC
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
P3.3
P3.1
R03
P5.6
P5.3
COM0
P4.3
P4.5
P4.7
P1.2
P1.0
P6LED0
P6LED2
P6.4
VeREF+
P5.1
HEADER 20X2
VCC
J4
URXD0
S32
S30
S28
S26
S24
S22
S20
S18
S16
S14
S12
S10
S8
S6
S4
S2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
2
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
UTXD0
S33
S31
S29
S27
S25
S23
S21
S19
S17
S15
S13
S11
S9
S7
S5
S3
1
1.
2.
3.
4.
B
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
HEADER 20X2
DWN
RICH WILLIAMS
NOTES: UNLESS OTHERWISE SPECIFIED.
.1uF
CLK-OUT
P3.2
P5.4
P5.5
P5.7
P5.2
P4.2
P4.4
P4.6
P1.3
P1.1
/RST
P6LED1
P6LED3
P6.5
VREF+
VREFP5.0
P6LED[3-0]
.1uF
C46 MAX3232-SOIC16
A
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
3
61
99
98
IO
16
1
15
DVSS2
DVSS1
AVSS
LED4
LED3
LED2
LED1
BUT4
BUT3
BUT2
BUT1
T2OUT
R2IN
11
12
Fsel1
2
4
T1IN
R1OUT
TTL
7
8
T1OUT
R1IN
RS232
14
13
Fsel3
Fsel2
RS232OUT
RS232IN
88
89
OPTIONAL, DNP
1
6
2
7
3
8
4
9
5
R03
RF
14
15
16
17
18
19
20
21
22
23
P3.7
P3.6
P3.5
P3.4
P3.3/UCLK0
P3.2/SOMI0
P3.1/SIMO0
P3.0/STE0
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
P3.3
P3.2
P3.1
64
65
66
67
68
69
70
71
COM0
2
MODE
CLK
STDBY
LN/HOLD
TX-DATA
RX-DATA
RSSI
VCC
J3
U6
56
MODE
CLK
STDBY
LN/HOLD
TX-DATA
RX-DATA
RSSI
STROB
DATA
VCC
MSPF449
52
STROB
DATA
DET
CLK-OUT
R03
DET
CLK-OUT
P4.7/S34
P4.6/S35
P4.5/S36
P4.4/S37
P4.3/S38
P4.2/S39
P4.1
P4.0
COM0
RF
46
47
48
49
50
51
62
63
HEADER 7X2
0
VREFVeREF+
VREF+
P1.7/CA1
P1.6/CA0
P1.5/TACLK/ACLK
P1.4/TBCLK/SMCLK
P1.3/TBOUT/SVSOUT
P1.2/TA1
P1.1/TA0/MCLK
P1.0/TA0
P4.7
P4.6
P4.5
P4.4
P4.3
P4.2
P5.7/R33
P5.6/R23
P5.5/R13
P5.4/COM3
P5.3/COM2
P5.2/COM1
P5.1/S0
P5.0/S1
80
81
82
83
84
85
86
87
HEADER 6x2/SM
59
58
57
55
54
53
12
13
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
P5.7
P5.6
P5.5
P5.4
P5.3
P5.2
P5.1
P5.0
P2.7/ADC12CLK
P2.6/CAOUT
P2.5/URXD0
P2.4/UTXD0
P2.3/TB2
P2.2/TB1
P2.1/TB0
P2.0/TA2
12
10
8
6
4
2
XT2OUT
3
11
9
7
5
3
1
94
93
92
91
90
P6.0/A0
P6.1/A1
P6.2/A2
P6.3/A3
P6.4/A4
P6.5/A5
P6.6/A6
P6.7/A7/SVSin
J5
/RST_NMI
TCK
TMS
TDI
TDO/TDI
95
96
97
2
3
4
5
6
VCC_CPU
2
4
6
8
10
12
14
INTERPERT DRAWING IAW MIL-STD-100.
RESISTANCE VALUES ARE IN OHMS.
CAPACITANCE VALUES ARE IN FARADS.
PARTIAL REFERENCE DESIGNATIONS ARE SHOWN
FOR COMPLETE DESIGNATION, PREFIX WITH UNIT
NUMBER, ASSY. DESIGNATION AND SUBASSEMBLY
DESIGNATION.
DATE
3/12/03
CHK
EXCEPT AS MAY BE OTHERWISE PROVIDED BY CONTRACT, THIS
DRAWING OR SPECIFICATION IS THE PROPRIETARY PROPERTY OF
CNOWIRE TECHNOLOGY INC. IT IS ISSUED IN STRICT CONFIDENCE
AND SHALL NOT BE REPRODUCED OR COPIED OR USED (PARTIALLY OR
WHOLLY) IN ANY MANNER WITHOUT PRIOR EXPRESS WRITTEN
AUTHORIZATION OF CNOWIRE TECHNOLOGY INC.
C
CNOWIRE Technology
1400 Coleman Ave.,Bldg G-22, Santa Clara, CA. 95050
X
APRVD
XX/XX/XX
X
APRVD
XX/XX/XX
X
XX/XX/XX
D
Title
TRF6901/MSPF449 DEMO BD
Size
B
Date:
Document Number
Rev
100011SCH-01
Friday, April 25, 2003
A
Sheet
E
1
of
3
A
B
R21
C
E
D8
R23
LEDRED
LED1
D
100
VCC
D6
LEDGRN
LED3
RED
GRN
100
R17
10K
R22
4
R27
D7
LEDORN
LED2
R18
10K
R19
10K
R20
10K
4
D2
LEDYEL
LED4
SW1
ORN
YEL
100
1
2
3
4
100
8
7
6
5
Fsel1
Fsel2
Fsel3
Fsel4
A6E-4104
VCC
R13
10k
R14
10k
R15
10k
R16
10k
SW5
1
2
RED BUTTON
3
4
3
BUT1
3
5
PB SPST, NO
SW4
ORANGE BUTTON
RSSI-GRN
1
2
VCC
3
4
P6LED[3-0]
BUT2
PB SPST, NO
R24
5
D5
P6LED0
GRN
SW3
GREEN BUTTON
100
RSSI-YEL
D4
1
2
R25
3
4
BUT3
PB SPST, NO
5
P6LED1
YEL
100
RSSI-ORN
D3
SW2
YELLOW BUTTON
R26
1
2
P6LED2
2
3
4
ORN
5
RSSI-RED
D1
2
BUT4
PB SPST, NO
100
+
R28
C26
1.0uF
10%
16V
+
C27
1.0uF
10%
16V
+
C28
1.0uF
10%
16V
+
C29
1.0uF
10%
16V
P6LED3
RED
100
1
1
CNOWIRE Technology
1400 Coleman Ave.,Bldg G-22,
Santa Clara, CA. 95050
Title
EXCEPT AS MAY BE OTHERWISE PROVIDED BY CONTRACT, THIS
DRAWING OR SPECIFICATION IS THE PROPRIETARY PROPERTY OF
CNOWIRE TECHNOLOGY INC. IT IS ISSUED IN STRICT CONFIDENCE
AND SHALL NOT BE REPRODUCED OR COPIED OR USED (PARTIALLY OR
WHOLLY) IN ANY MANNER WITHOUT PRIOR EXPRESS WRITTEN
AUTHORIZATION OF CNOWIRE TECHNOLOGY INC.
A
B
C
D
TRF6901/MSPF449 DEMO BD
Size
B
Date:
Document Number
Rev
100011SCH-01
Friday, April 25, 2003
A
Sheet
E
2
of
3
B
C
BW:230K
IF
DNP
1
IN
IFIN1
3
OUT
C3
82pF
C6
120pF
2
4
E
FL1
SFECV10.7MS2S-A
C5
C2
D
GND
A
82pF
4.7pF
4
L2
4.7uH
LQG21C4R7N00T1
R6
MIXOUT
0
IFIN2
CO1
SMA EGDE
RF8
C4
15pF
RF7
L1
4.7uH
LQG21C4R7N00T1
3
1
DET
RF4
LNAVCC
PAVCC2
VCO
11
5
7
8
12
C54
C15
100pF
PAVCC
46
38
40
45
RX_DATA
PA_GND1
PA_GND2
VCO_GND1
VCO_GND2
R35
R39
R38
10
C48
10
C53
10
C52
.1uF
1
DVCC
C12
100pF
DNP
C13
25
24
23
22
R8
10K
DNP
2200pF
RX-DATA
RX-DATA
2
CLK-OUT
Y2
20.000MHZ
18K
R44
C21 1000pF
10
C41
10
C59
.1uF
.1uF
R36
R37
R43
MIXVCC
33
R10
C18
15pF
DVCC
.1uF
LNAVCC
Y1
10.700MHZ
+
C60
22uF
-20+80%
16V
C22
R9
C16
1000pF
.01uF
6.8K
XTALVCC
10
C49
10
C50
10
C51
.1uF
.1uF
.1uF
TX-DATA
1
C55
34
.1uF
.1uF
R32
DEMVCC
100pF
CER
35
XTAL
68pF
VCC
LPFOUT
36
XTALVCC
CLK-OUT
C17
C23
LN/HOLD
STDBY
MODE
STROB
CLK
DATA
.1uF
R40
C20
.1uF
DC/DC_IN
C1
C2
DC/DC_OUT
CPOUT
VCOTUNE
C19
SLC_CAP
VCO
VCOVCC
VCOVCC2
MIX_GND
DEM_GND
DEM_VCC
44
43
IF_IN1
IF_IN2
DET_OUT
CER_DIS
TRF6901PT
VCO_VCC2
13
2
47
3
48
VCO_VCC1
VCO_TUNE
150pF
LPF_OUT
CLK_OUT
XTAL
XTAL_VCC
10
15pF
PA_VCC
27
30
29
9
6.8nH
LQW1608A6N8D00
C8
LPFIN
37
3
L5
LPF_IN
1
6
2.2pF
LNAIN2
3
220K
41
PAOUT
TX_DATA
XTALSW
4
32
31
RF3
RSSI_OUT
TX-DATA
XTALSW
RF5
LEARN/HOLD
STDBY
MODE
STROBE
CLK
DATA
6
4
3
1
2
C14
0.5pF
1000pF
39
26
21
19
18
20
1K
LNAIN1
RSSI
C39
R7
LN/HOLD
STDBY
MODE
STROB
CLK
DATA
0.5pF
1
2.7pF
MIX_OUT
1K
C25
DIG_VCC
CP_GND
DIG_GND
GND
C11
R12
LNA_VCC
MIX_VCC
U1
CP_VCC
3
2
RSSI
2.7pF
RF2
17
14
28
42
5
SAW FILTER
7MHZ B/W
C10
10nH
LQW1608A10NG00
8.2nH
LQW1608A8N2D00
16
2
RF6
L4
L3
CP_OUT
22pF
FL2
FILTER 915MHz
SAFC915MA70N-TC11
DEMVCC
15
47nH
C24
DET
RF1
JP1
R11
68pF
MIXVCC
C9
ANT LOOP
C7
1
C30
.1uF
C40
.1uF
C56
.1uF
CNOWIRE Technology
C58
.1uF
1400 Coleman Ave.,Bldg G-22,
Santa Clara, CA. 95050
Title
EXCEPT AS MAY BE OTHERWISE PROVIDED BY CONTRACT, THIS
DRAWING OR SPECIFICATION IS THE PROPRIETARY PROPERTY OF
CNOWIRE TECHNOLOGY INC. IT IS ISSUED IN STRICT CONFIDENCE
AND SHALL NOT BE REPRODUCED OR COPIED OR USED (PARTIALLY OR
WHOLLY) IN ANY MANNER WITHOUT PRIOR EXPRESS WRITTEN
AUTHORIZATION OF CNOWIRE TECHNOLOGY INC.
A
B
C
D
TRF6901/MSPF449 DEMO BD
Size
B
Date:
Document Number
Rev
100011SCH-01
Friday, April 25, 2003
A
Sheet
E
3
of
3