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參數(shù)資料
| 型號(hào)： | UPD7554AG |
| 廠商： | NEC 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)： | 8/64頁 |
| 文件大?。?/td> | 991K |
| 代理商： | UPD7554AG |
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8
μ
PD7554A, 7554A(A)
1.4
CAUTION ON USE OF P00/INT0 PIN AND RESET PIN
In addition to the functions shown in 1.1, 1.2 and 1.3, the P00/INT0 pin and RESET pin have a function for setting
the test mode in which the internal operation of the
μ
PD7554A is tested (IC test only).
When a potential greater than V
SS
is applied to either of these pins, the test mode is set. As a result, if noise
exceeding V
SS
is applied during normal operation, the test mode will be entered and normal operation may be
impeded.
If, for example, the routing of the wiring between the P00/INT0 pin and RESET pin is long, the above problem
may occur as the result of inter-wiring noise between these pins.
Therefore, wiring should be carried out so as to suppress inter-wiring noise as far as possible. If it is not possible
to suppress noise, anti-noise measures should be taken using external parts as shown in the figures below.
Connection of diode with small V
F
between P00/
INT4/RESET pin and V
SS
Connection of capacitor between P00/INT0/
RESET pin and V
SS
V
DD
V
DD
P00/INT0, RESET
V
SS
V
DD
V
DD
P00/INT0, RESET
V
SS
Diode
with
Small V
F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD7554AG-597-E2 | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD7554AG-597-E2-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD7554AG-603-E2 | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD7554AG-603-E2-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD7554AG-611-E2 | 制造商:Renesas Electronics Corporation 功能描述: |
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