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參數(shù)資料
| 型號： | HD404324 |
| 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)： | 36/94頁 |
| 文件大小： | 573K |
| 代理商： | HD404324 |
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HD404328 Series
36
When the MCU is in watch mode or subactive mode, if the high level period before the falling edge of
INT
0
is shorter than the interrupt frame,
INT
0
is not detected. Also, if the low level period after the
falling edge of
INT
0
is shorter than the interrupt frame,
INT
0
is not detected.
Edge detection is shown in figure 19. The level of the
INT
0
signal is sampled by a sampling clock.
When this sampled value changes to low from high, a falling edge is detected.
In figure 20, the level of the
INT
0
signal is 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 is not detected. In (b), the sampled
value is high at point A, and also high at point B. A falling edge is not detected in this case either.
When the MCU is in watch mode or subactive mode, keep the high level and low level period of
INT
0
longer than interrupt frame.
INT
Sampling
0
High
Low
Low
Figure 19 Edge Detection
A: Low
B: Low
INT
0
Interrupt
frame
a. High level period
A: High
B: High
INT
0
Interrupt
frame
b. Low level period
Figure 20 Sampling Example
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| HD404324FS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
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| HD404324S | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324U | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
| HD404324UFS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity |
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