Advantech PCI-1710 user manual Digital I/O Registers BASE+16 and BASE+17, Read Digital Input

4.13Digital 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

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
Table 4-14: Register for digital output
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

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.

4.14Programmable 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.

44 PCI-1710/1710HG User's Manual