National-instruments PCI-6023E User Manual Page 52
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Chapter 4 Signal Connections
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National Instruments Corporation 4-23 PCI-6023E/6024E/6025E User Manual
In Figure 4-11, port A of one PPI is configured for digital output, and
port B is configured for digital input. Digital input applications include
receiving TTL signals and sensing external device states such as the state
of the switch in Figure 4-11. Digital output applications include sending
TTL signals and driving external devices such as the LED shown in
Figure 4-11.
Port C Pin Assignments
♦ PCI-6025 Only
The signals assigned to port C depend on how the 82C55A is configured.
In mode 0, or no handshaking configuration, port C is configured as two
4-bit I/O ports. In modes 1 and 2, or handshaking configuration, port C
is used for status and handshaking signals with any leftover lines available
for general-purpose I/O. Table 4-3 summarizes the port C signal
assignments for each configuration. You can also use ports A and B in
different modes; the table does not show every possible combination.
Note
Table 4-3 shows both the port C signal assignments and the terminology
correlation between different documentation sources. The 82C55A terminology
refers to the different 82C55A configurations as modes, whereas NI-DAQ,
ComponentWorks, LabWindows/CVI, and LabVIEW documentation refers to
them as handshaking and no handshaking.
Table 4-3.
Port C Signal Assignments
Configuration Terminology Signal Assignments
PCI-6023E/
6024E/6025E
User Manual
National
Instruments
Software
PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
Mode 0
(Basic I/O)
No
Handshaking
I/O I/O I/O I/O I/O I/O I/O I/O
Mode 1
(Strobed Input)
Handshaking
I/O I/O IBF
A
STB
A
* INTR
A
STB
B
* IBFB
B
INTR
B
Mode 1
(Strobed Output)
Handshaking
OBF
A
* ACK
A
* I/O I/O INTR
A
ACK
B
* OBF
B
* INTR
B
Mode 2
(Bidirectional
Bus)
Handshaking
OBF
A
* ACK
A
* IBF
A
STB
A
* INTR
A
I/O I/O I/O
*Indicates that the signal is active low.
Subscripts A and B denote port A or port B handshaking signals.
PCI.book Page 23 Wednesday, September 16, 1998 9:09 AM
- PCI-6023E/6024E/6025E 1
- User Manual 1
- Important Information 3
- Contents 4
- Chapter 4 5
- About This Manual 10
- Related Documentation 12
- Introduction 13
- What You Need to Get Started 14
- Unpacking 14
- Software Programming Choices 15
- Chapter 1 Introduction 16
- Register-Level Programming 17
- Optional Equipment 18
- Software Installation 19
- Hardware Configuration 19
- Hardware Installation 20
- I/O Connector 21
- PCI Connector 21
- Analog Input 22
- Table 3-2 23
- Measurement Precision 23
- Chapter 3 Hardware Overview 24
- Analog Output 25
- Digital I/O 26
- Timing Signal Routing 26
- Programmable Function Inputs 27
- Board and RTSI Clocks 28
- RTSI Triggers 28
- Signal Connections 30
- Chapter 4 Signal Connections 31
- PCI-6024E, and PCI-6025E 33
- Analog Input Signal Overview 37
- Floating Signal Sources 38
- Analog Input Modes 38
- Signal Sources 43
- Sources (RSE Configuration) 47
- Sources (NRSE Configuration) 47
- Figure 4-9 49
- Analog Output Connections 49
- All Boards 50
- PCI-6025E Only 51
- Port C Pin Assignments 52
- Digital I/O Power-up State 53
- Timing Specifications 54
- Mode 1 Input Timing 56
- Mode 1 Output Timing 57
- Mode 2 Bidirectional Timing 58
- Power Connections 59
- Timing Connections 59
- DAQ Timing Connections 61
- SCANCLK Signal 62
- EXTSTROBE* Signal 62
- TRIG1 Signal 63
- = 50-100 ns 64
- STARTSCAN Signal 65
- = 10 ns minimum 67
- = 50-150 ns 68
- SISOURCE Signal 69
- WFTRIG Signal 69
- UPDATE* Signal 70
- UISOURCE Signal 71
- GPCTR0_SOURCE Signal 72
- GPCTR0_GATE Signal 73
- GPCTR1_SOURCE Signal 75
- GPCTR1_GATE Signal 75
- Field Wiring Considerations 78
- Calibration 80
- Self-Calibration 81
- External Calibration 81
- Other Considerations 82
- Specifications 83
- Accuracy Information 84
- Transfer Characteristics 85
- Amplifier Characteristics 85
- Dynamic Characteristics 86
- Stability 86
- Output Characteristics 86
- Voltage Output 88
- DIO<0..7> 89
- Timing I/O 90
- Triggers 90
- Digital Trigger 90
- Appendix A Specifications 91
- Custom Cabling and Optional 92
- Connectors 92
- Optional Connectors 93
- Common Questions 98
- Analog Input and Output 99
- Timing and Digital I/O 100
- Appendix C Common Questions 101
- Customer Communication 103
- Telephone and Fax Support 104
- Technical Support Form 105
- Configuration Form 106
- Documentation Comment Form 107
- Glossary 108
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