Adlink PCI-8554 Bedienungsanleitung PDF herunterladen (Seite 38)

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Registers

There are a total of twenty-two bits on the cPCI/PCI-8554/R used for

selecting clock sources for Timer/Counter 1 ~ 10, CK1 and the debounce

system.

Address:

BASE + 0x10 ~ 0x12

Attribute:

write only

Data Format:

Bit 7 6 5 4 3 2 1 0

Base+0x10 C4N2 C4N1 C3N2 C3N1 C2N2 C2N1 C1N2 C1N1

Base+0x11 C8N2 C8N1 C7N2 C7N1 C6N2 C6N1 C5N2 C5N1

Base+0x12 - DBCSEL

- CK1SEL

C10N2 C10N1 C9N2 C9N1

Table 6. Timer/Counter Clock Mode Control Register

N1and C

N2: These two bits are used to control clock source of

Timer/Counter

= 1 ~ 10

CK1SEL: select source of

CK1

DBCSEL: select debounce clock

3.5 Digital Input Register

There are 8 digital input channels on the cPCI/PCI-8554/R.

Address: BASE + 0x18

Attribute:

read only

Data Format:

Bit 7 6 5 4 3 2 1 0

Base+0x18 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

Table 7. Digital Input Register

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 66 67

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Adlink PCI-8554 Bedienungsanleitung Seite 38