Measurement-computing PC-CARD-DAS16/330 Manual do Utilizador descarregar pdf (Página 19)

PC-CARD-DAS16/330 User's Guide Functional Details

A logic diagram of the A/D pacer clock and counter is shown here:

Control Register BASE + 6h

TRGPOL TRGSEL TRGCLR CLK2 CTR1

1/10

10 MHz

OSC

Trigger

Logic

TS1 TS0

MUX

S/W CONVERT

Trigger

Logic

CRT1 CLK

CTR1 GATE

CTR1 OUT

A/D INTERNAL

PAC ER OUT

A/D PACER GATE

A/D EXTERNAL

TRIGGER

A/D EXTERNAL

CLOCK

A/D Convert CLock

Control register

BASE + 4h

CLK

Counter 1

Counter 2

Counter 3

10K

GATE

OUT

Figure 9. Counter/pacer logic diagram

Additional information on the 82C54 programmable counter/timer is available on our web site at

www.mccdaq.com/PDFmanuals/82c54.pdf

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Measurement-computing PC-CARD-DAS16/330 Manual do Utilizador Página 19