The layout of the I/O signal pins on the 24 bit interface connector and its description are shown below.
A slash (/) symbol preceding signal names means that they are negative logic (active low).
|
Pin number |
Signal name |
Input/Output |
Description |
|
1 |
GND |
N/A |
Ground. |
|
2 |
/INPUT1 |
Input |
When this port receives a negative pulse, /OUTPUT1 and /OUTPUT2 are changed to the Low level. |
|
3 |
/OUTPUT1 |
Output |
Changes to the Low level when /INPUT1 receives a negative pulse. A command can be available for altering the Low/High level logic. |
|
4 |
/OUTPUT2 |
Output |
Changes to the Low level when /INPUT1 receives a negative pulse. A command can be available for altering the Low/High level logic. |
|
5 |
/PORT A0 |
Output |
Bit 0 of port A (8 bit parallel output port) |
|
6 |
/PORT A1 |
Output |
Bit 1 of port A. |
|
7 |
/PORT A2 |
Output |
Bit 2 of port A. |
|
8 |
/PORT A3 |
Output |
Bit 3 of port A. |
|
9 |
/PORT A4 |
Output |
Bit 4 of port A. |
|
10 |
/PORT A5 |
Output |
Bit 5 of port A. |
|
11 |
/PORT A6 |
Output |
Bit 6 of port A. |
|
12 |
/PORT A7 |
Output |
Bit 7 of port A. |
|
13 |
/PORT B0 |
Output |
Bit 0 of port B (8 bit parallel output port) |
|
14 |
/PORT B1 |
Output |
Bit 1 of port B. |
|
15 |
/PORT B2 |
Output |
Bit 2 of port B. |
|
16 |
/PORT B3 |
Output |
Bit 3 of port B. |
|
17 |
/PORT B4 |
Output |
Bit 4 of port B. |
|
18 |
/PORT B5 |
Output |
Bit 5 of port B. |
|
19 |
/PORT B6 |
Output |
Bit 6 of port B. |
|
20 |
/PORT B7 |
Output |
Bit 7 of port B. |
|
21 |
/PORT C0 |
Input/Output |
Bit 0 of port C (4 bit parallel I/O port) |
|
22 |
/PORT C1 |
Input/Output |
Bit 1 of port C . |
|
23 |
/PORT C2 |
Input/Output |
Bit 2 of port C. |
|
24 |
/PORT C3 |
Input/Output |
Bit 3 of port C. |
|
25 |
/PORT D0 |
Input/Output |
Bit 0 of port D (4 bit parallel I/O port) |
|
26 |
/PORT D1 |
Input/Output |
Bit 1 of port D |
|
27 |
/PORT D2 |
Input/Output |
Bit 2 of port D. |
|
28 |
/PORT D3 |
Input/Output |
Bit 3 of port D. |
|
29 |
PORT C STATUS |
Output |
Port C status signal. This signal is changed to the High level when port C is configured to output port. It is changed to the Low level when the port is configured to input port. |
|
30 |
PORT D STATUS |
Output
|
Port D status signal. This signal is changed to the High level when port D is configured to output port. It is changed to the Low level when the port is configured to input port. |
|
31 |
/WRITE STROBE |
Output |
A output port write strobe signal. When data is present (that is, output level changes) on any of the output ports, this signal provides a negative pulse. |
|
32 |
|
Not Used |
|
|
33 |
/SWEEP END |
Output
|
A sweep completion signal. When measurement (all sweeps of all channels) and data calculation are completed, this signal provides a negative pulse. |
|
34 |
+5V |
Output
|
Provides +5V DC power supply for external instruments. |
|
35 |
/PASS FAIL |
Output |
Each limit test's results signal. This signal changes to the High level when limit test, bandwidth test, or ripple test results return FAIL. It changes to the Low level when all limit test results return PASS. |
|
36 |
/PASS FAIL STROBE |
Output |
Limit test result write strobe signal. When limit test result is present on /PASS FAIL, this signal provides a negative pulse. |