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參數(shù)資料
| 型號： | UPD78218ACW |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 35/66頁 |
| 文件大?。?/td> | 510K |
| 代理商： | UPD78218ACW |
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35
μ
PD78217A, 78218A
Set the RESET signal active in the reset operation at power-on until the oscillation stabilization time (approx. 40
ms) elapses.
Fig. 4-7 Reset Operation at Power-On
4.4
RESET
When a low level is input to the RESET pin, the internal hardware is initialized (reset state).
When the RESET input changes from low level to high level, the following data is set in the program counter (PC).
Lower 8 bits of PC :
Upper 8 bits of PC :
Contents of 0000H address
Contents of 0001H address
The contents of the PC set the destination address and the program starts to be executed from the address.
Therefore, it can start from any address by reset start.
Please set the program for the contents of each register as required.
A noise eliminator has been incorporated in the RESET input circuit to prevent any error from noise. This noise
eliminator is a sampling circuit based on analog delay.
Fig. 4-6 Reset Acknowledge
Delay
Delay
Reset Start
Delay
Reset End
PC Initialization
Instruction Execution
of Reset Start Address
RESET
(Input)
Internal
Reset Signal
RESET
(Input)
Internal
Reset Signal
V
DD
Oscillation Stabilization Time
Delay
PC Initialization
Instruction Execution of Reset Start Address
Reset End
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