Download SMextend 750 User`s Manual

SMextend 750
SmartMedia Extender
User’s Manual
Preliminary
M200042-00
July 1998
Sycard Technology
1180-F Miraloma Way
Sunnyvale, CA 94086
(408) 749-0130
(408) 749-1323 FAX
http://www.sycard.com
SMextend 750 User’s Manual
Page 1
1.0 Introduction
Sycard Technology's SMextend 750 SmartMedia (SSFDC) extender card is a debug tool for SmartMedia
development and test. SMextend offers the following features:
•
•
•
•
•
•
•
•
•
Supports 3.3, 5V or dual voltage hosts
Configurable for 3.3V or 5V operation
4 layer construction to insure low noise environment
All 22 pins available as test points
Signals clearly marked
Vcc can be isolated through jumper blocks for current measurements
Surface mount resistors can be added to any signal line
Vcc LEDs indicate 3.3V or 5V operation
Convenient grounding posts for scope probes or other test equipment
2.0 Using the SMextend 750
The SMextend 750 must be configured for 3.3, 5.0, or dual voltage operation prior to use. Section 2.1 describes the
procedure for first time setup.
Caution:
Caution Insertion and removal of the extender and SmartMedia card should be done with care. The
SmartMedia’s fragile connectors may be broken or bent if improper force is used. Both card and extender
should be inserted straight without any lateral movement or force. Proper care and use of the extender card
will insure years of trouble free operation.
GND
Vcc
VCC
CE#
RE#
R/B#
OP
LVD
JP2
D7
D6
D5
D4
JP3 VCC
GND
CLE
ALE
WE#
WP#
D0
D1
D2
D3
GND
GND
3.3V
Sycard
Technology
SMextend 750
5V
JP4
GND
VCC
5V
LED EN
Figure 2.0-1 The SMextend 750
M200042-00
1998 Sycard Technology
Page 2
SMextend 750 User’s Manual
2.1 Preparing the SMextend 750 for use
As shipped from the factory the SMextend 750 is configured with voltage keys disabled. In this condition, the
SMextend may not be accepted into many SmartMedia sockets. The SmartMedia standard defines two voltage keys,
one for 3.3V and one for 5V. 3.3V only cards have a cutout corner adjacent to pin 22 of the connector. 5V only
cards have a cutout adjacent to pin 12. Cards that can operate at both 3.3V and 5V have both cutouts. The following
section describes how to configure the SMextend for the desired operating voltage.
2.1.1 Removing the voltage key.
The 3V key should be removed if the card is to be used in a 3.3V host. The 5V key should be removed for 5V hosts.
The voltage key can be removed with a small pair of pliers or a wire cutter. The SMextend 750 PCB is scored along
the proper cut marks. After the user removes the keys, it may be necessary to clean the freshly cut edge of the board
with a small file. Some sockets may not accept the SMextend 750 if these edges are not smooth.
Note:
Note Once removed, the voltage keys cannot be reattached.
2.2 Using the SMextend
Use of the SMextend 750 is fairly straightforward. The SMextend is inserted into the host socket with the connector
pattern in the correct orientation. The SmartMedia card is then inserted, with the connector pattern facing down, into
SMextend 750’s socket.
Caution:
Caution The SMextend socket is keyed to accept both 3.3V and 5V SmartMedia cards. This configuration
could allow a 3.3V only card to be plugged into a 5V host causing damage to either the card or the host. The
user should verify compatibility by first trying to inserting the SmartMedia card into the host prior to using
the extender card.
2.3 Test points
All 22-pins of the interface are available to probe through clearly marked headers. The headers are standard 0.1”
dual row headers with 0.025” posts designed to accept a wide variety of test probes and cable assemblies.
2.4 Power Indicators
Two LED power indicators display the status of the socket’s Vcc. The PWR LED indicates that power is applied to
the board. When both the PWR LED and the 5V LED are lit, a Vcc of greater than approximately 3.5V is present.
When only the PWR LED is lit, the Vcc is at a level of less than 3.5V.
Note:
Note The power LEDs are designed to indicate the presence of power on the Vcc supply pins. The LEDs
do not provide an accurate measurement of Vcc. Use a voltmeter to determine the actual operating voltage.
In some low power applications, the current drawn by the power LEDs (10-20mA) may cause problems. The
SMextend is capable of disabling the LED voltage indication by removing the jumper labeled LED EN at JP4.
2.5 Current Measurements
The Vcc power bus may be isolated from the SmartMedia Card socket through two jumper blocks labeled JP2 and
JP3. Both jumpers must be removed to isolate the power. A current meter can be inserted to measure card current
consumption.
Caution:
Caution Care must be taken to insure that the current measuring device is inserted before turning on power
to the host socket. Improper power sequencing may cause a damaging latchup condition.
1998 Sycard Technology
M200042-00
SMextend 750 User’s Manual
Page 3
2.6 Termination Area
An area with SMT resistors is located between the test points and the card connector allows access to all SmartMedia
signals. A series of surface mount pads allows the user to isolate a signal by cutting a trace. The user may also add
series resistors to any signal.
When shipped from the factory, the resistor pads are shorted with PCB traces. In order to insert series resistor, these
traces must be cut prior to soldering the resistor to the board. Figure 2.3-1 illustrate the termination areas located on
the back of the SMextend board. Use this guide when making modifications to the board, since the silk-screen
designations may be difficult to read.
3V
22
12
1
11
R14
CLE
CE#
R13
R15
ALE
RE#
R12
R16
WE#
R/B#
OP
R11
R18
WP#
R10
R17
D0
LVD
R9
R1
D1
D7
R8
R2
D2
D6
R7
R3
D3
D5
R6
D4
R5
5V
Figure 2.6-1 Termination Area - Solder
Solder Side
R14
CLE
CE#
R13
R15
ALE
RE#
R12
R16
WE#
R/B#
R11
R18
WP#
OP
R10
R17
D0
LVD
R9
R1
D1
D7
R8
R2
D2
D6
R7
R3
D3
D5
R6
D4
R5
Figure 2.6-2 Termination Area - Close-up
M200042-00
1998 Sycard Technology
Page 4
SMextend 750 User’s Manual
Appendix
A. SmartMedia Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
Name
Vss
CLE
ALE
WE#
WP#
D0
D1
D2
D3
Vss
Vss
Description
Ground
Command Latch Enable
Address Latch Enable
Write Enable
Write Protect
Address/Data Bit 0
Address/Data Bit 1
Address/Data Bit 2
Address/Data Bit 3
Ground
Ground / Card Detect
Pin
12
13
14
15
16
17
18
19
20
21
22
Name
Vcc
D4
D5
D6
D7
LVD
GND
R/B#
RE#
CE#
Vcc
Description
Power
Address/Data Bit 4
Address/Data Bit 5
Address/Data Bit 6
Address/Data Bit 7
Low Voltage Detect
Ground
Ready / Busy#
Read Enable
Card Enable
Power
5V
1998 Sycard Technology
3V
1
11
22
12
M200042-00
SMextend 750 User’s Manual
Page 5
B. SMextend 750 Schematic
M200042-00
1998 Sycard Technology
P1
CLE
ALE
WE
WP
IO0
IO1
IO2
IO3
CD
IO4
2
3
4
5
6
7
8
9
11
13
CLE
ALE
WE#
WP#
AD0
AD1
AD2
AD3
IO5
IO6
IO7
LVD
OP
R/B
RE
CE
VCC
VCC
GND
GND
14
15
16
17
18
19
20
21
12
22
1
10
AD5
AD6
AD7
LVD
OP
R/B#
RE#
CE#
AD4
R14
0
R15
0
R16
0
R18
0
R17
0
R1
0
R2
0
R3
0
AD4R
2
3
4
5
6
7
8
9
11
13
R5
0
R6
0
R7
0
AD5R
AD6R
AD7R
LVDR
OPR
R/BR#
RER#
CER#
14
15
16
17
18
19
20
21
IO5
IO6
IO7
LVD
OP
R/B
RE
CE
R8
0
R9
0
R10
0
23
24
25
26
3VSW1
3VSW2
5VSW1
5VSW2
R11
0
R12
0
12
22
1
10
VCC
VCC
GND
GND
R13
0
VCC
SSFDC
J1
CLE
ALE
WE
WP
IO0
IO1
IO2
IO3
CD
IO4
CLER
ALER
WER#
WPR#
AD0R
AD1R
AD2R
AD3R
VCC1
SSFDC CONN
OP and CD# are optional power pins.
JP2
VCC1
VCC
JUMPER
C1
0.1uF
C3
0.1uF
C4
0.1uF
JP3
C5
0.1uF
C6
0.1uF
C2
0.1uF
C8
0.1uF
JUMPER
VCC
5V LED
JP4
D1
D2
R20
RED LED
110
VCC
JUMPER
1N5226
3.3V Zener
SOT23
VCC LED
VCC
D3
R19
YELLOW LED
330
CE#
RE#
R/B#
OP
LVD
AD7
AD6
AD5
AD4
JP1
1
2
3
4
5
6
7
8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
HEADER 11X2
CLE
ALE
WE#
WP#
AD0
AD1
AD2
AD3
Sycard Technology
Title
File = ORCAD31\SSFDC\SSFDC1.S31
SSFDC EXTENDER
Size Document Number
B
140031
Date:
May 22, 1998 Sheet
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