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Appendix D Register-Level Programming
National Instruments Corporation D-25 PC-LPM-16/PnP User Manual
Digital Input Register
Read the Digital Input Register to return the logic state of the I/O connector’s eight
digital input lines.
Address: Base address + 05 (hex)
Type: Read-only
Word Size: 8-bit
Bit Map:
Bit Name Description
7–0 D<7..0> 8-Bit Input Data Bit—These eight bits represent the
logic state of the digital input lines DIN 0 through
DIN 7.
7 6 5 4 3 2 1 0
D7 D6 D5 D4 D3 D2 D1 D0
a.Book : l.Appendix D Page 25 Wednesday, November 20, 1996 6:36 PM