參數(shù)資料
型號: HD404334
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計(jì)算機(jī))
文件頁數(shù): 48/78頁
文件大?。?/td> 491K
代理商: HD404334
HD404339 Series
48
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 8. 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 8
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
T
×
(255 – N) T
×
(N + 1)
Timer write
register
updated to
value N
Interrupt
request
T
×
(N' + 1)
T
×
(255 – N)
T
×
(N + 1)
Reload
Timer write
register
updated to
value N
Interrupt
request
T
T
×
(255 – N)
T
Timer write
register
updated to
value N
Interrupt
request
T
T
×
(255 – N)
T
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