Agilent Technologies 4294A Service Manual download pdf (Page 125)

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101

Chapter 9 125

Communication with External Equipment (Using the I/O Ports)

Using the I/O Ports

1. Chapter Title

2. Chapter Title 3. Chapter Title

9. Communication with

5. Chapter Title

Exernal Equipment

(Using the I/O Ports)

Table 9-1 Signal assignment

Pin number Signal name Signal specification

1 GND 0 V

2 INPUT1TTL TTL level, pulse input (width: 1 μs or more)

3 OUTPUT1 TTL level, latch output

4 OUTPUT2 TTL level, latch output

5 Output port A0 TTL level, latch output

6 Output port A1 TTL level, latch output

7 Output port A2 TTL level, latch output

8 Output port A3 TTL level, latch output

9 Output port A4 TTL level, latch output

10 Output port A5 TTL level, latch output

11 Output port A6 TTL level, latch output

12 Output port A7 TTL level, latch output

13 Output port B0 TTL level, latch output

14 Output port B1 TTL level, latch output

15 Output port B2 TTL level, latch output

16 Output port B3 TTL level, latch output

17 Output port B4 TTL level, latch output

18 Output port B5 TTL level, latch output

19 Output port B6 TTL level, latch output

20 Output port B7 TTL level, latch output

21 Input/output port C0 TTL level, latch output

22 Input/output port C1 TTL level, latch output

23 Input/output port C2 TTL level, latch output

24 Input/output port C3 TTL level, latch output

25 Input/output port D0 TTL level, latch output

26 Input/output port D1 TTL level, latch output

27 Input/output port D2 TTL level, latch output

28 Input/output port D3 TTL level, latch output

29 Port C status TTL level (input mode: LOW, output mode: HIGH)

30 Port D status TTL level (input mode: LOW, output mode: HIGH)

31 Write strobe signal TTL level, negative logic, pulse output (width: 10 μs; typical)

32 +5V pull-up

33 SWEEP END signal TTL level, negative logic, pulse output (width: 7 μs; typical)

34 +5V +5V, 100 mA MAX

35 PASS/FAIL signal TTL level (PASS: HIGH, FAIL: LOW), latch output

36 PASS/FAIL write strobe

signal

TTL level, negative logic, pulse output (width: 10 μs; typical)

1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 517 518

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