Lucent Technologies MN10285K - Manual (Page 100)

Timers
16-Bit Timer Setup Examples
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
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Panasonic
Figure 4-30 below shows the output waveforms for TM4OA. Both A and B
interrupts can occur, but B interrupts can only occur if the TM4CB setting is from
0 to less than TM4CA. This is because when TM4CB
≤
TM4CA, TM4BC never
matches TM4CB.
Figure 4-30 Single-Phase PWM Output Timing (Timer 4)
Write to TM4MD
TM4EN
TM4BC
B OSC /4
CLRBC4
S4
R4
TM4OA
Interrupts
0 1 2 3 4 0 0 1 2 3 4 0 1 2 3 4 0 1 2 3
AB AB AB
B A B A B B A
(1) TMCB = 4 (All 0s)
S4
R4
TM4OA
Interrupts
(2) TMCB = 2
A A A
S4
R4
TM4OA
Interrupts
0s on first cycle, since
S4 has not gone high yet.
(3) TMCB = FFFF (All 1s)