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CHAPTER 9 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
(b) When CM0nx (BFCMnx) = 0000H is set
Figure 9-18. Operation Timing in PWM Mode 0 (Symmetric Triangular Wave, BFCMnx = 0000H)
TM0n
count value
0000H
BFCMnx
CM0nx
Interrupt request
DTMnx
Positive phase
(TO0n0, TO0n2, TO0n4)
Negative phase
(TO0n1, TO0n3, TO0n5)
Remarks 1. n = 0, 1
2. x = 0 to 2
3. t: Dead time = (DTRRn + 1)/f
4. The above figure shows an active high case.
Since TM0n = CM0nx = 0000H match is detected during up counting by TM0n, the F/F is just set and
does not get reset. Even when the setting value is 0000H, F/F is changed in the cycle during which
transfer is performed from BFCMnx to CM0nx similarly to when the setting value is other than 0000H.
Figure 9-19 shows the change timing from the 100% duty state.
CM0n3
a
a
CM0nx
CM0nx
match
match
a
0000H
a
INTCM0n3
F/F
t
t
(f
: Base clock)
CLK
CLK
User's Manual U14492EJ3V0UD
CM0n3
CM0nx
match
0000H
0000H
INTTM0n
INTCM0n3
t
INTTM0n
265
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