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參數(shù)資料
| 型號： | HD404816FS |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | 4-Bit Single-Chip Microcomputer |
| 中文描述： | 4位單片機(jī) |
| 文件頁數(shù)： | 38/100頁 |
| 文件大小： | 384K |
| 代理商： | HD404816FS |
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HD404818 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 be detected. Also, if the low level period after the
falling edge of
INT
0
is shorter than the interrupt frame,
INT
0
is not be detected.
Edge detection is shown in figure 18. 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 19, 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 the interrupt frame.
High
Low
INT
Sampling
0
Low
Figure 18 Edge Detection
A: Low
B: Low
INT
Interrupt
frame
0
A: High
B: High
INT
Interrupt
frame
0
(a) High level period
(b) Low level period
Figure 19 Sampling Example
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD404816H | 4-Bit Single-Chip Microcomputer |
| HD404816TF | 4-Bit Single-Chip Microcomputer |
| HD404888 | Low-Voltage AS Microcomputers with On-Chip LCD Circuit |
| HD404888H | Low-Voltage AS Microcomputers with On-Chip LCD Circuit |
| HD404889 | Low-Voltage AS Microcomputers with On-Chip LCD Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404816H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404816TF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404818 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404818FS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:16-digit LCD driver |
| HD404818H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
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