Filter
Top Products
44 PCI-1710/1710HG User's Manual
4.13 Digital I/O Registers BASE+16
and BASE+17
The PCI-1710/1710HG card offers 16 digital input channels and 16
digital output channels. These I/O channels use the input and output
ports at addresses BASE+16 and BASE+17.
Table 4-13: Register for digital input
Table 4-14: Register for digital output
Note! The default configuration of the digital output chan-
nels is a logic 0. This avoids damaging external
devices during system start-up or reset since the
power on status is set to the default value.
4.14 Programmable Timer/Counter
Registers BASE+24, BASE+26,
BASE+28 and BASE+30
The four registers of BASE+24, BASE+26, BASE+28 and BASE+30
are used for the 82C54 programmable timer/counter. Please refer to
Appendix A data sheets for detailed application information.
Note! Users have to use a 16-bit (word) command to read/
write each register.
Read Digital Input
Bit # 7 6 5 4 3 2 1 0
BASE+17 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
BASE+16 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
Write Digital Output
Bit # 7 6 5 4 3 2 1 0
BASE+17 DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8
BASE+16 DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0