參數(shù)資料
型號: M37536E8SP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 31/45頁
文件大?。?/td> 474K
代理商: M37536E8SP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7536 Group
MITSUBISHI MICROCOMPUTERS
31
Reset Circuit
The microcomputer is put into a reset status by holding the RESET
pin at the “L” level for 15
μ
s or more when the power source voltage
is 4.1 to 5.5 V and X
IN
is in stable oscillation.
After that, this reset status is released by returning the RESET pin to
the “H” level. The program starts from the address having the con-
tents of address FFFD
16
as high-order address and the contents of
address FFFC
16
as low-order address.
Note that the reset input voltage should be 0.82 V or less when the
power source voltage passes 4.1 V.
Fig. 37 Example of reset circuit
Fig. 38 Timing diagram at reset
(Note)
0.2 V
CC
0 V
0 V
Poweron
V
CC
RESET
V
CC
RESET
Power source
voltage
detection circuit
Power source
voltage
Reset input
voltage
Note :
Reset release voltage Vcc = 4.1 V
Data
Address
8-13 clock cycles
Reset address from the
vector table
1 :
A built-in ring oscillator applies about 250 kHz frequency clock as
φ
at average of Vcc = 5 V.
2 :
The mark
means that the address is changeable depending on the previous state.
3 :
These are all internal signals except RESET
Notes
RESET
RESET
OUT
SYNC
FFFC
FFFD
AD
H
,AD
L
AD
L
AD
H
Clock from built-in
ring oscillator
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