Specifications

Register Structure & Format •• 15
3
Register Structure & Format
3.1 I/O Registers Format
The PCI-7200 occupies 8 consecutive 32-bit I/O addresses in the
PC I/O address space and the cPCI-7200 occupies 9 consecutive
32-bit I/O addresses. Table 4.1 shows the I/O Map
Address Read Write
Base + 0 Counter 0 Counter 0
Base + 4 Counter 1 Counter 1
Base + 8 Counter 2 Counter 2
Base + C --- CLK Control CW0
Base + 10 Digital Input Reg. ---
Base + 14 Digital Output (Read-
back)
Digital Output Reg.
Base + 18 DIO Status & Control DIO Status &Control
Base + 1C INT Status & Control INT Status & Control
Base + 20
(cPCI-7200
only)
AUXDIO Reg. AUXDO Reg.
Caution: (1) I/O port is 32-bit width
(2) 8-bit or 16-bit I/O access is not allowed.