參數(shù)資料
型號: HD404458
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計算機(jī))
文件頁數(shù): 38/120頁
文件大?。?/td> 692K
代理商: HD404458
HD404459 Series
38
Notes on Use:
When the MCU is in watch mode or subactive mode, if the high level period before the falling edge of
INT
0
and
WU
0
WU
7
is shorter than the interrupt frame,
INT
0
and
WU
WU
7
will not be detected.
Also, if the low level period after the falling edge of
INT
0
and
WU
0
WU
7
is shorter than the interrupt
frame,
INT
0
and
WU
0
WU
7
will not be detected.
Edge detection is shown in figure 23. The level of the
INT
0
and
WU
0
WU
7
signals are sampled by a
sampling clock. When this sampled value changes from high to low, a falling edge is detected.
In figure 24, the level of the
INT
0
and
WU
0
WU
7
signals are sampled by an interrupt frame. In (a) the
sampled value is low at point A, and also low at point B. Therefore, a falling edge will not be detected.
In (b), the sampled value is high at point A, and also high at point B. A falling edge will not be detected
in this case either.
When the MCU is in watch mode or subactive mode, keep the high level and low level periods of
INT
0
and
WU
0
WU
7
longer than interrupt frame.
High
Low
INT
0
,
WU
0
WU
7
Sampling
Low
Figure 23 Edge Detection
A: Low
B: Low
INT
0
,
WU
0
WU
7
Interrupt
frame
A: High
B: High
INT
0
,
WU
0
WU
7
Interrupt
frame
a. High level period
b. Low level period
Figure 24 Sampling Example
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404458H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
HD404459 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
HD404459H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers
HD404459SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD404508FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller