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CHAPTER 8 8-BIT TIMERS H0 AND H1
User’s Manual U19780EJ2V0UD
274
Figure 8-12. Operation Timing in PWM Output Mode (1/4)
(a) Basic operation
Count clock
8-bit timer counter Hn
CMP0n
TMHEn
INTTMHn
TOHn
(TOLEVn = 0)
TOHn
(TOLEVn = 1)
00H 01H
A5H 00H 01H 02H
A5H 00H
A5H 00H
01H 02H
CMP1n
A5H
01H
<1>
<2>
<3>
<4>
<1> The count operation is enabled by setting the TMHEn bit to 1. Start the 8-bit timer counter Hn by masking
one count clock to count up. At this time, PWM output outputs an inactive level.
<2> When the values of the 8-bit timer counter Hn and the CMP0n register match, an active level is output. At
this time, the value of the 8-bit timer counter Hn is cleared, and the INTTMHn signal is output.
<3> When the values of the 8-bit timer counter Hn and the CMP1n register match, an inactive level is output. At
this time, the 8-bit timer counter value is not cleared and the INTTMHn signal is not output.
<4> Clearing the TMHEn bit to 0 during timer Hn operation sets the INTTMHn signal to the default and PWM
output to an inactive level.
Remark
n = 0, 1