ADLINK Technology PCIe-7432, Руководство пользователя, Страница: 21 / 32

Register Format 11
PCIe-7432
3 Register Format
The following detailed register format descriptions are helpful for
low-level programming, although it is recommended that users
first fully understand the PCIe interface.
3.1 I/O Address Map
As PCIe-7432 registers are 32 bits long, they are accessible via
32-bit I/O instruction. The register address map, including descrip-
tions and offset addresses relative to the base address, is as fol-
lows.
Table 3-1: I/O Register Map
3.2 Digital Input Register
Each bit of based address corresponds to a signal on one of the
32 digital input channels.
Address: BASE + 0 to BASE + 3 for 7432
Attribute: Read Only
Data format: 7432
Table 3-2: IDI_N: Isolated Digital Input CH N
Address Write Read
Base + 0x00 Isolated DO Isolated DI
Base + 0x40 Clear IRQ --
NOTE:
NOTE:
X
I/O port is 32 bits wide
X
There is no 8-bit or 16-bit I/O access
7 6 5 4 3 2 1 0
Base + 0 IDI_7 IDI_6 IDI_5 IDI_4 IDI_3 IDI_2 IDI_1 IDI_0
Base + 1 IDI_15 IDI_14 IDI_13 IDI_12 IDI_11 IDI_10 IDI_9 IDI_8
Base + 2 IDI_23 IDI_22 IDI_21 IDI_20 IDI_19 IDI_18 IDI_17 IDI_16
Base + 3 IDI_31 IDI_30 IDI_29 IDI_28 IDI_27 IDI_26 IDI_25 IDI_24