NEC mPD789426 Series, User Manual

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CHAPTER 7 8-BIT TIMER
User’s Manual U15075EJ1V0UM00
167
Figure 7-24. Operation Timing in PWM Free-Running Mode (When Both Edges Are Selected) (2/2)
(2) When CR50 = Odd number
Count clock
CR50
TCE50
INTTM50
TO50
2N + 1
TM50 2N + 1
00H
00H 01H
FFH FFH 2N + 1 01H
01H
00H
Overflow Overflow Overflow
Count start
Caution When both edges are selected, do not set CR50 to 00H, 01H, and FFH. If the CR50 is set to
these values, PWM output may not be performed normally.
Figure 7-25. Operation Timing in PWM Free-Running Mode
(When Both Edges Are Selected) (When CR50 Is Overwritten)
Count clock
CR50
TCE50
INTTM50
TO50
2N + 1
TM50 2N 00H 00H 00H 01H FFH
FFH 01H
2N + 1
01H 02H FEH
2N
Overflow Overflow Overflow
Count start
CR50 overwrite