Measurement-computing Digital488/80A Manuel d'utilisateur Page 23
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Digital I/O Ports
CAUTION
When the HVCX1 option is used, the I/O lines are hardware configured as either
inputs or outputs. The hardware and software configurations for the input and output
ports must agree. The Digital488/80A unit is protected from configuration conflict,
but the I/O lines will not respond properly.
The Digital488/80A has two DB-50 connectors -- Channel 0 and Channel 1 -- each of which provides 40
data lines programmable in groups of 8 bits as either input or output ports. The following figure illustrates
one of the digital I/O DB-50 connectors as viewed from the rear panel of the Digital488/80A. Both
Channel 0 and Channel 1 DB-50 connectors are identical.
DB-50 Con or nect
Pin Description Comment Pin Description Comment
1 Port 1 Bit 1 I/O, Port 1 LSB 26 Port 4 Bit 2 Input/Output
2 Port 1 Bit 2 Input/Output 27 Port 4 Bit 3 Input/Output
3 Port 1 Bit 3 Input/Output 28 Port 4 Bit 4 Input/Output
4 Port 1 Bit 4 Input/Output 29 Port 4 Bit 5 Input/Output
5 Port 1 Bit 5 Input/Output 30 Port 4 Bit 6 Input/Output
6 Port 1 Bit 6 Input/Output 31 Port 4 Bit 7 Input/Output
7 Port 1 Bit 7 Input/Output 32 Port 4 Bit 8 I/O, Port 4 MSB
8 Port 1 Bit 8 I/O, Port 1 MSB 33 Port 5 Bit 1 I/O, Port 5 LSB
9 Port 2 Bit 1 I/O, Port 2 LSB 34 Port 5 Bit 2 Input/Output
10 Port 2 Bit 2 Input/Output 35 Port 5 Bit 3 Input/Output
11 Port 2 Bit 3 Input/Output 36 Port 5 Bit 4 Input/Output
12 Port 2 Bit 4 Input/Output 37 Port 5 Bit 5 Input/Output
13 Port 2 Bit 5 Input/Output 38 Port 5 Bit 6 Input/Output
14 Port 2 Bit 6 Input/Output 39 Port 5 Bit 7 Input/Output
15 Port 2 Bit 7 Input/Output 40 Port 5 Bit 8 I/O, Port 5 MSB
16 Port 2 Bit 8 I/O, Port 2 MSB 41 Clear Output only
17 Port 3 Bit 1 I/O, Port 3 LSB 42 Data Strobe Output only
18 Port 3 Bit 2 Input/Output 43 Trigger Output only
19 Port 3 Bit 3 Input/Output 44 Inhibit Output only
20 Port 3 Bit 4 Input/Output 45 Service Input Input only
21 Port 3 Bit 5 Input/Output 46 External Data Ready Input only
22 Port 3 Bit 6 Input/Output 47 (Not Used) (Not Used)
23 Port 3 Bit 7 Input/Output 48 HVCX1 Flyback Flyback
24 Port 3 Bit 8 I/O, Port 3 MSB 49 +5 V 50 mA maximum load
25 Port 4 Bit 1 I/O, Port 4 LSB 50 I/O Common Ground
Digital488/80A User’s Manual 11-08-02 Digital488/80A Setup 17
- User's Manual 1
- Introduction to this Manual 3
- Table of Contents 4
- 7 - Troubleshooting 5
- A - Appendix A 5
- B - Appendix B 5
- Digital488/80A Overview 1 7
- Accessories 8
- Specifications 9
- CAUTION 10
- Data Transfer Speeds 10
- Digital488/80A Setup 2 11
- Hardware Setup 12
- Default DIP Switch Settings 13
- Addressing Mode Selection 13
- Secondary Address Settings 14
- HVCX1 Option Setup 16
- WARNING 16
- Digital I/O Ports 23
- Introduction 25
- Line Voltage Selection 26
- Fuse Replacement 28
- Rack Mount 29
- Bench Top 29
- Power-Up Activation 30
- Programming Examples 31
- C0 is in use 33
- C) command C5 was executed 33
- Digital488/80A Operation 4 35
- Clear (Pin 41) 36
- Data Strobe (Pin 42) 36
- Trigger (Pin 36
- Inhibit (Pin 44) 37
- Service (Pin 45) 37
- External Data Ready (Pin 46) 37
- IEEE 488 Bus Support 38
- Bus Addresses 40
- Bus Terminators 40
- IEEE 488 Background 5 41
- Bus Lines & Bus Commands 42
- Handshake Lines 43
- Data Transfer Lines 43
- Bus Command Groups 44
- More On Service Requests 45
- Digital488/80A Commands 6 47
- Command Syntax 48
- Command Set & Support 49
- Command Summary 50
- - SRQ on Ready 51
- Command Reference 52
- A - Bit Set 53
- B - Bit Clear 54
- C - Configuration 55
- D - Data Output 56
- E? - Query Error Status 57
- F - Data Format 59
- G - Bus Input/Output 63
- H - Handshake 64
- I - Invert 65
- K - End-Or-Identify 66
- L - Buffer 67
- M - Service Request Mask 68
- O - Recall Configuration 69
- P - Port Select 70
- Q - Inhibit 71
- R - Data Ready 72
- S - Save Configuration 73
- T - Test 74
- U - User Status 75
- V - View Configuration 78
- V? - View Version 79
- X - Execute 80
- Y - Bus Terminator 81
- ? - Query 82
- Serial Poll Status Byte 83
- Troubleshooting 7 85
- Buffer Overrun 86
- Query Error Status 86
- Appendix A A 87
- Software Setup 88
- Appendix B B 91
- IEEE 488 Bus Commands 92
- ASCII Codes 93
- ASCII Code Details 95
- Abbreviations 104
- Notes 106
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