Electronics America Computer Hardware User Manual

204

PD78214 Sub-Series

Fig. 7-120 Setting Procedure for One-Shot Timer Operation

Fig. 7-121 Procedure for Starting an Additional One-Shot Timer Operation

One-shot timer

Set one-shot timer mode

; Sets bit 5 of TMC1 to 1

Set PRM1 register

Set count value in CR21 register

Set CRC2 register

Start counting

; Sets bit 7 of TMC1 to 1

INTC21 interrupt

CE2←1

CRC2←10H

CR21←n

CMD2←1

Restarting one-shot timer

Set count value in CR21

Restart counting

; Clears bit 6 of TMC1 to 0

INTC21 interrupt

CR21←n

OVF2←0