DASP-52016 Card User’s Manual
Registry Structure and Format
17
C h a p t e r 3
Register Structure and Format
3.1 Overview
The DASP-52016 board occupies 4 consecutive I/O address. The
address of each register is defined as the board’s base address plus
an offset. The I/O registers and their corresponding functions are
listed in the followings.
Address
Write
Read
Base Address 0
PCI Bridge Configuration Registers in
Memory Space
Base Address 1
PCI Bridge Configuration Registers in I/O
Space
Base Address 2 Reserved
Readback of the
output status
Base Address 3 Low byte
Low byte
Relay output
(CH0 ~ CH7)
Digital input
(CH0~CH7)
3.2 Relay Output
The DASP-52016 provides 8 relay output. The low 8 bits (D0 - D7) of
the relay 0 ~ 7 outputs are stored in base address 0. A high bit turns
the relay on while a low bit turns the relay off. The 8 bits of relay
output register are shown in the following.
Relay output: (Write)
Base Address 3 D7
D6
D5
D4
D3
D2
D1
D0
Output
Channel 7 6 5 4 3 2 1 0
