參數(shù)資料
型號(hào)： M37531
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 8 Bits CMOS Microcomputer(8位單片機(jī))
中文描述： 單芯片的CMOS 8位單片機(jī)（8位單片機(jī)）
文件頁(yè)數(shù)： 28/64頁(yè)
文件大?。?/td> 631K
代理商： M37531
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7531 Group
MITSUBISHI MICROCOMPUTERS
28
Reset Circuit
The microcomputer is put into a reset status by holding the RESET
pin at the
“
L
”
level for the following interval or more according to the
power source voltage 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.
When V
CC
= 2.2 to 5.5 V, reset input
“
L
”
interval is 45
μ
s or more
When V
CC
= 2.4 to 5.5 V, reset input
“
L
”
interval is 35
μ
s or more
When V
CC
= 4.0 to 5.5 V, reset input
“
L
”
interval is 15
μ
s or more
In the case of f(
φ
)
≤
4 MHz, the reset input voltage must be 0.8 V or
less when the power source voltage passes 4.0 V.
In the case of f(
φ
)
≤
2 MHz, the reset input voltage must be 0.48 V or
less when the power source voltage passes 2.4 V.
In the case of f(
φ
)
≤
1 MHz, the reset input voltage must be 0.44 V or
less when the power source voltage passes 2.2 V.
Fig. 35 Example of reset circuit
Fig. 36 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 = 2.2 V
Data
Address
8-13 clock cycles
Reset address from the
vector table
1 :
A built-in ring oscillator applies about 250 kHz frequency as clock
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
φ
RESET
RESET
OUT
SYNC
FFFC
FFFD
AD
H
,AD
L
AD
L
AD
H
Clock from built-in
ring oscillator
相關(guān)PDF資料
PDF描述
M37534 Single Chip 8 Bits CMOS Microcomputer(8位單片機(jī))
M37700 16-Bit Single-Chip Microcomputer(16位單片微控制器)
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M37733MHB Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
M37735S4L Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
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