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©
National Instruments Corporation 22-1 DAQ Hardware Overview Guide
22
652
X
Devices
This chapter contains overview information on the 652X devices, including
the PCI-6527 and PXI-6527.
The 652X devices have 48 bits of parallel, isolated digital I/O. These 48 bits
are divided into six DIO ports of eight bits each and are referred to as
ports 0 through 5 by the DIO functions. It is unnecessary to configure the
port directions since the direction of each port is fixed. Output ports on
these devices have read-back capabilities. Table 22-1 shows the direction
of each port on the 6527.
Table 22-1.
Port Directions for the PCI/PXI-6527
Port Number Port Direction
0 Input
1 Input
2 Input
3 Output with read-back
4 Output with read-back
5 Output with read-back
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