National Instruments PCI-1200 用户手册
Chapter 3
Signal Connections
3-16
© National Instruments Corporation
Figure 3-7 shows how to make analog output signal connections.
Figure 3-7. Analog Output Signal Connections
Digital I/O Signal Connections
Pins 13 through 37 of the I/O connector are digital I/O signal pins. Digital
I/O on the PCI-1200 uses the 82C55A integrated circuit. The 82C55A is a
general purpose peripheral interface containing 24 programmable I/O pins.
These pins represent the three 8-bit ports (PA, PB, and PC) of the 82C55A.
I/O on the PCI-1200 uses the 82C55A integrated circuit. The 82C55A is a
general purpose peripheral interface containing 24 programmable I/O pins.
These pins represent the three 8-bit ports (PA, PB, and PC) of the 82C55A.
Pins 14 through 21 are connected to the digital lines PA<7..0> for digital
I/O port A. Pins 22 through 29 are connected to the digital lines PB<7..0>
for digital I/O port B. Pins 30 through 37 are connected to the digital lines
PC<7..0> for digital I/O port C. Pin 13, DGND, is the digital ground pin for
all three digital I/O ports. Refer to Appendix A,
I/O port A. Pins 22 through 29 are connected to the digital lines PB<7..0>
for digital I/O port B. Pins 30 through 37 are connected to the digital lines
PC<7..0> for digital I/O port C. Pin 13, DGND, is the digital ground pin for
all three digital I/O ports. Refer to Appendix A,
, for signal
voltage and current specifications.
The following specifications and ratings apply to the digital I/O lines. All
voltages are with respect to DGND.
voltages are with respect to DGND.
10
DAC0OUT
Channel 0
Channel 1
Analog Output Channels
PCI-1200
DAC1OUT
AGND
11
12
+
+
VOUT 1
VOUT 0
Load
Load
I/O Connector
–
–