UPD780828A Datasheet, PDF (148/472 Pages) NEC – 8-bit Single-Chip Microcontroller

Chapter 7 8-Bit Timer/Event Counters 50 and 51
Figure 7-19: PWM Output Operation Timings (CRn = FFH, active high setting)
Count Clock
TMn Count Value
CRn
TCEn
INTTMn
OVFn
TOn
00
01 02
FF
Inactive Level
Remark: n = 50, 51
FF 00 01 02
FF
Active Level
FF 00 01 02 00
FF
Inactive Level
Inactive Level
Active Level
Figure 7-20: PWM Output Operation Timings (CRn changing, active high setting)
Count
Clock
TMn
Count
Value
CRn0
CRn Changing
(N M)
FF 00 01 02
N
N N+1 N+2
N
FF 00 01 02
M
M M+1 M+2 M+3 00
M
TCEn
INTTMn
OVFn
TOn
Active Level
Inactive Level
Active Level
Inactive Level
Remark: n = 50, 51
Caution: If CRn is changed during TMn operation, the value changed is not reflected until TMn
overflows.
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User’s Manual U16504EE1V1UD00