參數(shù)資料
型號(hào)： M38C12M4-XXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP64
封裝： 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁數(shù)： 31/59頁
文件大?。?/td> 704K
代理商： M38C12M4-XXXFP
Rev.2.40
Jun 14, 2004
page 37 of 56
38C1 Group
Fig. 37 Example of reset circuit
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 2 s or more. Then the RESET pin is returned to an “H”
level (the power source voltage should be between VCC(min.) and
5.5 V), reset is released. After the reset is completed, the program
starts from the address contained in address FFFD16 (high-order
byte) and address FFFC16 (low-order byte). Make sure that the re-
set input voltage is less than 0.2 VCC for VCC of VCC (min.).
Fig. 38 Reset Sequence
Power on
Power
source
voltage
Reset input
voltage
Power source voltage
detection circuit
0.2 VCC
0V
VCC
RESET
VCC
RESET
Note: Reset release voltage VCC = 3.0 V
(Note)
RESET
SYNC
φ
ROSC
FFFC
FFFD
ADH, ADL
ADL
??
ADH
ROSC: about 35
clock cycles
Notes 1 : f(ROSC) and
φ are in the relationship : f(ROSC) = 8f(φ)
2 : A question mark (?) indicates an undefined status that depends on the previous status.
Reset address from vector table
Internal
reset
Address
Data
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