NEC PD78214 User Manual
Page 167
138
µ
PD78214 Sub-Series
Fig. 7-41 Setting Procedure for PPG Output
PPG output
Set CRC0 register
Set TOC register
Set P34 pin in control mode
Set period in compare
register CR01
; Sets bit 3 of TMC0
CRC0
←D8H
PMC3.4
←1
Set duty factor in compare
register CR00
Start counting
CE0
←1
Fig. 7-42 Changing Duty Factor of PPG Output
CIF00
←0
Preprocessing for
changing duty factor
Clear INTC00 interrupt request
flag
; Clears bit 4 of IF0L
Enable INTC00 interrupt
; Clears bit 4 of MK0L
INTC00 interrupt
Duty factor changing
processing
Set duty factor in CR00
CMK00
←0
Disable INTC00 interrupt
; Sets bit 4 of MK0L
CMK00
←1
RETI