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參數(shù)資料
| 型號： | UPD784031GC-8BT |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16/8-BIT單片機 |
| 文件頁數(shù)： | 51/90頁 |
| 文件大?。?/td> | 377K |
| 代理商： | UPD784031GC-8BT |
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μ
PD784031
51
12. RESET FUNCTION
Applying a low-level signal to the RESET pin initializes the internal hardware (reset status).
When the RESET input makes a low-to-high transition, the following data is loaded into the program counter (PC):
Eight low-order bits of the PC
Intermediate eight bits of the PC : Contents of location at address 0001H
Four high-order bits of the PC
: 0
: Contents of location at address 0000H
The PC contents are used as a branch destination address. Program execution starts from that address. Therefore,
a reset start can be performed from an arbitrary address.
The contents of each register can be set by software, as required.
The RESET input circuit contains a noise eliminator to prevent malfunctions caused by noise. This noise eliminator
is an analog delay sampling circuit.
Figure 12-1. Accepting a Reset
RESET
(input)
Delay
Delay
Delay
Initialize PC
Execute instruction
at reset start address
Internal reset signal
Start reset
End reset
For power-on reset, the RESET signal must be held active until the oscillation settling time (approximately 40 ms)
has elapsed.
Figure 12-2. Power-On Reset
Oscillation settling time
Delay
Initialize PC
Execute instruction at
reset start address
RESET
(input)
Internal reset signal
End reset
V
DD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD784031GC-8BT-A | 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT/16BIT 78K4 CISC ROMLESS 3.3V/5V 80PQFP - Trays 制造商:Renesas Electronics 功能描述:16 制造商:Renesas Electronics 功能描述:16 Cut Tape |
| UPD784031GK-9EU-A | 制造商:Renesas Electronics Corporation 功能描述:16BIT K4 ROMLESS - Bulk |
| UPD784031YGC-8BT | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD784031YGC-8BT-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD784031YGK-9EU | 制造商:Renesas Electronics Corporation 功能描述: |
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