ADLINK cPCI-8554/R - Manual (Page 36)

26 • Registers
3.2 I/O Address Map
All cPCI/PCI-8554/R registers are 8 bits long. Users can access these
registers using 8-bit I/O instructions. The following table shows the
registers address map, including descriptions and their offset addresses
relative to the base address.
I/O Address Write Read
Base + 0x00 ~ 0x03
Counter 1~3 & Mode
Control
Counter 1 ~ 3
Base + 0x04 ~ 0x07
Counter 4~6 & Mode
Control
Counter 4 ~ 6
Base + 0x08 ~ 0x0B
Counter 7~9 & Mode
Control
Counter 7 ~ 9
Base + 0x0C ~0x0F
Counter 10~12 & Mode
Control
Counter 10 ~ 12
Base + 0x10 ~ 0x12 Clock Mode Control - -
Base + 0x18 Digital Output Digital Input
Table 4. I/O Address Map of cPCI/PCI-8554/R