參數(shù)資料
型號(hào)： HD404654S
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 63/109頁(yè)
文件大小： 430K
代理商： HD404654S
HD404654 Series
63
Notes on Use
When using the timer output as PWM output, note the following point. From the update of the timer write
register until the occurrence of the overflow interrupt, the PWM output differs from the period and duty
settings, as shown in table 23. The PWM output should therefore not be used until after the overflow
interrupt following the update of the timer write register. After the overflow, the PWM output will have the
set period and duty cycle.
Table 23 PWM Output Following Update of Timer Write Register
PWM Output
Mode
Timer Write Register is Updated during
High PWM Output
Timer Write Register is Updated during
Low PWM Output
Free running
Timer write
register
updated to
value N
Interrupt
request
Timer write
register
updated to
value N
Interrupt
request
T
×
(255 – N) T
×
(N + 1)
T
×
(N' + 1)
T
×
(255 – N)
T
×
(N + 1)
Reload
Timer write
register
updated to
value N
Interrupt
request
Timer write
register
updated to
value N
Interrupt
request
T
T
×
(255 – N)
T
T
T
×
(255 – N)
T
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