Download MOD-EKG Electro cardiogram sensor with MSP430

MOD-EKG development board
Users Manual
All boards produced by Olimex are ROHS compliant
Revision Initial, June 2011
Copyright(c) 2011, OLIMEX Ltd, All rights reserved
Page 1
INTRODUCTION:
MOD-EKG is digital heart-rate monitor based on TI's MSP430FG439 microcontroller. The heartbeat rate per minute is displayed on the LCD. In addition, the
application outputs a digital data stream via an RS232 serial port to allow EKG
waveform display on a PC. The only way to do this is via board's UEXT connector,
where RS232 signals are leaded. The connection between the PC and MOD-EKG can
be made by using our adapter – MOD-USB-RS232 that converts the RS signals into
USB signals, and vice versa.
An electrocardiogram (ECG), also called an EKG, is a graphic tracing of the
voltage generated by the heart muscle during a heartbeat. In this application, the
EKG waveform is used by the MCU to measure the heartbeat rate. Because heartbeat calculation is the major focus the electrodes are simplified to two connections,
one to a right hand and the other to the left hand.
BOARD FEATURES:
•
Microcontroller: MSP430FG439
•
EKG amplifiers realized with INA321EA
•
JTAG connector for direct plug in MSP430 2x7 JTAG connector to
provide power for the target board
•
UEXT connector so it can be connected to other board as heart beat
monitor sensor board
•
LCD custom display
•
Lithium coin battery holder
•
Extension headers for all microcontroller ports – no connectors
mounted on the board
•
Right and left hands contact electrodes – HR1 and HR2
•
Two status leds
•
Two user buttons
•
Switch between Battery and UEXT power supply
•
Based on Texas Instruments application note SLAA280a
•
FR-4, 1.5 mm, soldermask, component print
•
Dimensions: 76.20 x 71.12 mm ( 3.00 x 2.80 ")
Page 2
ELECTROSTATIC WARNING:
The MOD-EKG board is shipped in protective anti-static packaging. The board
must not be subject to high electrostatic potentials. General practice for working
with static sensitive devices should be applied when working with this board.
BOARD USE REQUIREMENTS:
Cables: The cable you will need depends on the programmer/debugger you use. If
you use MSP430-JTAG-TINY, MSP430-JTAG-TINY-V2, or MSP430-JTAG-ISO, you
will need USB A-B cable. If you use MSP430-JTAG, you will need LPT cable.
Hardware:
Programmer/Debugger MSP430-JTAG, MSP430-JTAGTINY, MSP430-JTAG-TINY-V2, MSP430-JTAG-ISO or other compatible
programming/debugging tool.
PROCESSOR FEATURES:
MOD-EKG board uses ultralow power microcontroller MSP430FG439 from Texas
Instruments with these features:
−
Low Supply-Voltage Range, 1.8 V to 3.6 V
−
Ultralow-Power Consumption:
−
Active Mode: 300 μA at 1 MHz, 2.2 V
−
Standby Mode: 1.1 μA
−
Off Mode (RAM Retention): 0.1 μA
−
Five Power Saving Modes
−
Wake-Up From Standby Mode in Less Than 6 μs
−
16-Bit RISC Architecture, 125-ns Instruction Cycle Time
−
Single-Channel Internal DMA
−
12-Bit A/D Converter With Internal Reference, Sample-and-Hold and
Autoscan Feature
−
Three Configurable Operational Amplifiers
−
Dual 12-Bit D/A Converters With Synchronization
−
16-Bit Timer_A With Three Capture/Compare Registers
−
16-Bit Timer_B With Three Capture/Compare-With-Shadow Registers
−
On-Chip Comparator
−
Serial Communication Interface (USART), Select Asynchronous UART or
Synchronous SPI by Software
−
Brownout Detector
Page 3
−
Supply Voltage Supervisor/Monitor With Programmable Level Detection
−
Bootstrap Loader
−
Serial Onboard Programming, No External Programming Voltage Needed
Programmable Code Protection by Security Fuse
−
Integrated LCD Driver for Up to 128 Segments
−
60KB+256B Flash Memory
−
2KB RAM
Page 4
BLOCK DIAGRAM:
Page 5
MEMORY ORGANIZATION:
Page 6
1
2
10nF
2
4
6
8
10
12
14
BH14S
JTAG
1
3
5
7
9
11
13
JTAG
RST
TDO
TDI
TMS
TCK
4
5
6
4
1
5
2
6
3
1
2
3
3V-LI_BAT+ -BC-2001
+
Page 7
G ND
NA
10uF/6.3V
P1.6/CA0
P1.5/TACLK/ACLK
P1.4/TBCLK/SMCLK
P1.3/TBOUTH/SVSOUT
P1.2/TA1
P1.1/TA0/MCLK
P1.0/TA0
XT2OUT
XT2IN
TDO/TDI
TDI
TMS
TCK
RST/NMI
P6.0/A0/OA0I0
P6.1/A1/OA0O
P6.2/A2/OA0I1
AVSS
DVSS1
AVCC
NA
GND
TDO
TDI
TMS
TCK
RST
P6.0
P6.1
P6.2
GND
GND
VCC
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
C10
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
C9
P3.3/UCLK0/S28
P3.4/S27
P3.5/S26
P3.6/S25/DMAE0
P3.7/S24
S23
S22
S21
S20
P2.6/CAOUT/S19
P2.7/ADC12CLK/S18
S17
S16
S15
S14
S13
S12
S11
S10
P4.0/S9
NA
1
2
3
4
VEREF+
VREF+
VEREF-
NA
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
10uF/6.3V
NA(0 R)
C12
0R
R30
P2.3
VCC
REF
R3 1
680 k
150k
R11
R2 6
3
327 68Hz/6pF
1
R10
680k
2
Q1
R33
R13
CO M2
S0
P3.7
P3 .5
UCLK0
SIMO 0
4
680k
5
45
R9
6
44
10 0nF
7
43
8
6
4
2
8
6
4
2
NA(HN2X4)
7
5
3
1
PO RT5
NA(HN2X4)
R23
CO M3
CO M1
S1
8
6
4
2
8
6
4
2
NA(HN2X4)
7
5
3
1
PO RT6
NA(HN2X4)
7
5
3
1
UCLK0
P3.4
P3.5
P3.6
P3.7
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
e
d
g
a
P6.6
P6 .4
P6.2
P6.0
S3
S5
S7
S9
S19
UTXD0
P2 .2
P2.0
http://www.olimex.com/dev
P6 .6
P1 .6
c
b
CO PYRIG HT(C) 2 011, O L IMEX Ltd.
Rev. B
MOD-EKG
P6.7
P6 .5
P6.3
P6.1
S2
S4
S6
S8
PO RT4
7
5
3
1
P3.6
P3 .4
SO MI0
P3.0
7
5
3
1
PO RT2
NA(HN2 X4)
8
6
4
2
PO RT3
S18
URXD0
P2 .3
P2.1
OLIMEX
NA(HN2 X4)
P1.6
P1.4
P1 .2
P1.0
Extensions
7
5
3
1
PO RT1
P3.4
9
C11
42
S1
8
6
4
2
8
P1.7
P1.5
P1 .3
P1.1
41
100k
100k
P3.6
P3.5
10
S23
P3.7
R7
R8
11
S20
S21
S22
C8
100nF
P1.7
P2 .0
P2.1
P2.2
P2 .3
UTXD0
URXD0
G ND
VCC
R33
R23
R13
R03
CO M3
CO M2
CO M1
CO M0
P3.0
SIMO 0
SO MI0
12
S16
S17
S18
S19
MSP430 FG 439
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
37
S14
S15
U1
P1.7/CA1
P2.0/TA2
P2.1/TB0
P2.2/TB1
P2.3/TB2
P2.4/UTXD0
P2.5/URXD0
DVSS2
DVCC2
P5.7/R33
P5.6/R23
P5.5/R13
R03
P5.4/COM3
P5.3/COM2
P5.2/COM1
COM0
P3.0/STE0/S31
P3.1/SIMO0/S30
P3.2/SOMI0/S29
S2
NA(0R) 38
R28
39
NA(0R) 40
LCD
R27
S0
R29
4.7k
13
f
14
36
SW 2
LCD
NA
15
35
18
O LIMEX_LTD
C16
NA(0R)
0R
R22
34
S11
S3
19
T1107A(6x3.8x2.5mm)
VCC
VCC
P6 .6
P6.1
16
20
T1107A(6x3.8x2.5mm)
SW 1
1 .5nF
17
33
21
DVCC1
P6.3/A3/OA1I1/OA1O
P6.4/A4/OA1I0
P6.5/A5/OA2I1/OA2O
P6.6/A6/DAC0/OA2I0
P6.7/A7/DAC1/SVSIN
VREF+
XIN
XOUT
VEREF+/DAC0
VREF-/VEREFP5.1/S0/A12/DAC1
P5.0/S1/A13
P4.7/S2/A14
P4.6/S3/A15
P4.5/S4
P4.4/S5
P4.3/S6
P4.2/S7
P4.1/S8
1k
NA
R2 1
C15
P6 .5 R24 1 M NA
P6.0
32
22
C7
100nF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
R6
1k
umHF
R25
R23 1 0k NA
P1 .3 R18
NA
R2 0
24
C6
100nF
VCC
P6 .3
P6.4
P6.5
P6 .6
P6.7
VREF+
XIN
XO UT
VEREF+
VEREFS0
S1
S2
S3
S4
S5
S6
S7
S8
GYX-SD-TC0805SURK(RED)
R5
P6 .2
100n F
1
8
4
6
S8
S9
S10
23
C5
100n F
2
IS-1390(Default: UEXT is closed)
NA
C13
A3
VOUT
RG
SHUTDOWN
V-
A2
160k
48
LED2
C17
VCC
40k
47
GYX-SD-TC0805SURK(RED)
LED1
P6 .7
ECG amplifiers
HR2
HR4
A1
40k
28
31
1 0nF
3
VINVIN+
V+
160k
1M
S4
S5
S6
S7
30
100nF
J2
P1 .4
P1.5
SO MI0
SIMO 0
UCLK0
P3.0
1
1-2:Open; 2-3:Close
2
3
7
REF
R1 9
INA32 1EA
26
29
C3
C4
3
10 0k/1%
100k/1%
2.2M/1%
2 .2M/1%
820R
1M
5
P6.4
0R
S13
S12
27
C2
VCC
J1
R12
R13
R1 4
R15
R16
R17
P6.3
U2
100nF
46
BAT/UEXT
1
1-2:Open; 2-3:Close
HR3
HR1
C1 4
0R
VCC
R4
4.7k
UTXD0
URXD0
UEXT
25
3.3V_UEXT
BH10S
R3
4.7k
3 .3V_UEXT VCC VCC
UEXT-1
UEXT-2
UEXT-3
UEXT-4
UEXT-5
UEXT-6
UEXT-7
UEXT-8
UEXT-9
UEXT-10
1 0k
R2
VCC
2
C1
R1
100k
VCC
COM0
COM1
COM2
COM3
POWER SUPPLY
HN1x2(Close)
2
1
P_O UT
HN1x2(O pen)
P_IN
SCHEMATIC:
BOARD LAYOUT:
Page 8
POWER SUPPLY CIRCUIT:
MOD-EKG can take power from:
–+3V Lithium battery – when switch BAT/UEXT is in position BAT.
–JTAG – when jumper P_IN is closed and P_OUT is opened.
–UEXT connector - when switch BAT/UEXT is in position UEXT.
The programmed board power consumption is about 3.4 mA with all peripherals
enabled.
The power supply source depends on jumpers P_IN and P_OUT position and
BAT/UEXT switch position.
RESET CIRCUIT:
MOD-EKG reset circuit includes R1 (100k), C1(10nF), JTAG pin 11 and
MSP430FG439 pin 74 (RST/NMI).
CLOCK CIRCUIT:
Quartz crystal (Q1) 32.768 kHz is connected to MSP430FG439 pin 8 (XIN) and pin 9
(XOUT).
JUMPER DESCRIPTION:
P_IN
When this jumper is closed, the board is power supplied by the
standard JTAG pin 2. This is only possible when the consumption of
the board is not very high which is typically the case with MSP430
microcontrollers. If this jumper is open the board should be power
supplied by another external source. This jumper and P_OUT should
always be reversely open/closed, i.e. if P_IN is closed, P_OUT should
be open and vice versa.
Default state is opened.
P_OUT
When this jumper is closed, the board is power supplied not by the
JTAG but from external source. Then the JTAG has to synchronize
with the working voltages which is done through this line. This is
especially important when debugging with JTAG. This jumper and
P_IN should always be reversely open/closed, i.e. if P_OUT is closed,
P_IN should be open and vice versa.
Default state is closed.
Page 9
J1
When jumper J1 is shorted in position 1-2, UEXT pin 3 is connected to
MSP430FG439 pin 55 (P2.4/UTXD0) – signal “UTXD0”. When jumper
J1 is shorted in position 2-3, UEXT pin 3 is connected to
MSP430FG439 pin 54 (P2.5/URXD0) – signal “URXD0”.
Default state is shorted in position 2-3.
J2
When jumper J2 is shorted in position 1-2, UEXT pin 4 is connected to
MSP430FG439 pin 54 (P2.5/URXD0) – signal “URXD0”. When
jumper
J2 is shorted in position 2-3, UEXT pin 4 is connected to
MSP430FG439 pin 55 (P2.4/UTXD0) – signal “UTXD0”.
Default state is shorted in position 2-3.
Depending on jumpers J1 and J2 configuration, the board can work in host, or in device mode.
The default state of J1 and J2 is for device mode (shorted in position 2-3).
INPUT/OUTPUT:
LED1 (red) connected to MSP430FG439 pin 67 (P1.0/TA0).
LED2 (red) connected to MSP430FG439 pin 65 (P1.2/TA1).
User button with name SW1 connected to MSP430FG439 pin 59 (P2.0/TA2).
User button with name SW2 connected to MSP430FG439 pin 58 (P2.1/TB0).
Power supply switch with name BAT/UEXT – when in position BAT – the board is
power supplied via +3V lithium battery, when is in position UEXT – the board is
connected to other board with UEXT and is power supplied by the other board via
UEXT connector.
LCD custom display.
Page 10
EXTERNAL CONNECTORS DESCRIPTION:
UEXT:
Pin #
Signal Name
1
VDD
2
GND
3
TX
4
RX
5
P1.4
6
P1.5
7
SOMI0
8
SIMO0
9
UCLK0
10
P3.0
JTAG:
Pin #
Signal Name
Pin #
Signal Name
1
TDO
2
Via P_IN to VCC
3
TDI
4
Via P_OUT to VCC
5
TMS
6
Not Connected
7
TCK
8
Not Connected
Page 11
9
GND
10
Not Connected
11
RST
12
Not Connected
13
Not Connected
14
Not Connected
PORT1:
Pin #
Signal Name
Pin #
Signal Name
1
P1.0
2
P1.1
3
P1.2
4
P1.3
5
P1.4
6
P1.5
7
P1.6
8
P1.7
PORT2:
Pin #
Signal Name
Pin #
Signal Name
1
P2.0
2
P2.1
3
P2.2
4
P2.3
5
UTXD0
6
URXD0
7
S19
8
S18
PORT3:
Pin #
Signal Name
Pin #
Signal Name
1
P3.0
2
SIMO0
3
SOMI0
4
UCLK0
5
P3.4
6
P3.5
7
P3.6
8
P3.7
Page 12
PORT4:
Pin #
Signal Name
Pin #
Signal Name
1
S9
2
S8
3
S7
4
S6
5
S5
6
S4
7
S3
8
S2
PORT5:
Pin #
Signal Name
Pin #
Signal Name
1
S1
2
S0
3
COM1
4
COM2
5
COM3
6
R13
7
R23
8
R33
PORT6:
Pin #
Signal Name
Pin #
Signal Name
1
P6.0
2
P6.1
3
P6.2
4
P6.3
5
P6.4
6
P6.5
7
P6.6
8
P6.7
REF:
Pin #
Signal Name
Pin #
Signal Name
1
VEREF+
2
VREF+
3
VEREF-
4
GND
Page 13
MECHANICAL DIMENSIONS:
Page 14
AVAILABLE DEMO SOFTWARE:
Demonstrates heart rate measuring, using MSP430FG439 microcontroller.
–MOD-EKG_DemoSoft IAR for MSP v.4.21
Page 15
ORDER CODE:
MOD-EKG - assembled and tested board
How to order?
You can order to us directly or by any of our distributors.
Check our web www.olimex.com/dev for more info.
Revision history:
Board's revision:
Rev. B, April 2011
Manual's revision:
Rev. Initial, June 2011
Page 16
Disclaimer:
© 2011 Olimex Ltd. All rights reserved. Olimex®, logo and combinations thereof, are registered
trademarks of Olimex Ltd. Other terms and product names may be trademarks of others.
The information in this document is provided in connection with Olimex products. No license, express
or implied or otherwise, to any intellectual property right is granted by this document or in
connection with the sale of Olimex products.
Neither the whole nor any part of the information contained in or the product described in this
document may be adapted or reproduced in any material from except with the prior written
permission of the copyright holder.
The product described in this document is subject to continuous development and improvements. All
particulars of the product and its use contained in this document are given by OLIMEX in good faith.
However all warranties implied or expressed including but not limited to implied warranties of
merchantability or fitness for purpose are excluded.
This document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not
be liable for any loss or damage arising from the use of any information in this document or any error
or omission in such information or any incorrect use of the product.
Page 17