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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

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 63 64

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Advantech PCI-1710 Manual de usuario Pagina 48