Appendix D Register-Level Programming
PC-LPM-16/PnP User Manual D-20
National Instruments Corporation
Counter 1 Data Register
Use the Counter 1 Data Register to load and read back contents of MSM82C53 counter 1.
Address: Base address + 09 (hex)
Type: Read-and-write
Word Size: 8-bit
Bit Map:
Bit Name Description
7–0 D<7..0> A/D Conversion Data Bits 7 through 0—8-bit
counter 1 contents.
Counter 2 Data Register
Use the Counter 2 Data Register to load and read back contents of MSM82C53 counter 2.
Address: Base address + 0A (hex)
Type: Read-and-write
Word Size: 8-bit
Bit Map:
Bit Name Description
7–0 D<7..0> A/D Conversion Data Bits 7 through 0—8-bit
counter 2 contents.
7 6 5 4 3 2 1 0
D7 D6 D5 D4 D3 D2 D1 D0
7 6 5 4 3 2 1 0
D7 D6 D5 D4 D3 D2 D1 D0
a.Book : l.Appendix D Page 20 Wednesday, November 20, 1996 6:36 PM