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Appendix D Register-Level Programming
PC-LPM-16/PnP User Manual D-10
National Instruments Corporation
Status Register 1
Status Register 1 indicates the status of the current A/D conversion. The bits in this
register determine if a conversion is being performed, if data is available, if any errors
have been found, and the interrupt status.
Address:
Base address + 00 (hex)
Type:
Read-only
Word Size:
8-bit
Bit Map:
Bit Name Description
7 REVID Revision ID Bit—This bit identifies the board
revision. If this bit is cleared, the board is a revision A
legacy PC-LPM-16 board. If this bit is set, the board
is a revision B or later PC-LPM-16 board. The
revision B board has one more bit in Command
Register 2 to disable the data acquisition operation.
This bit is always set for the PC-LPM-16PnP board.
6–5 X Don’t care bits.
4 CONVPROG Conversion Progress Status Bit—When an A/D
conversion is in progress or the auto-calibration
operation of the ADC is in progress, this bit is set.
Otherwise, it is cleared.
7
6 5 4 3 2 1 0
REVID X X CONVPROG EXTINT* CNTINT DATAERR/
OVERFLOW
DAVAIL
a.Book : l.Appendix D Page 10 Wednesday, November 20, 1996 6:36 PM