參數(shù)資料
型號(hào): M37480E8SP
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(yè)數(shù): 44/97頁(yè)
文件大小: 1076K
代理商: M37480E8SP
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
44
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Reset Circuit
The microcomputer is put into a reset status by holding the
RESET pin at the “L” level for 2μs or more when the power source
voltage is 2.7 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
contents of address FFFF
16
as high-order address and the con-
tents of address FFFE
16
as low-order address.
Note that the reset input voltage should be 0.32 V or less when
the power source voltage passes 2.7 V.
Fig. 47 Reset circuit diagram
Fig. 48 Reset sequence
RESET
V
CC
RESET
V
CC
Power source
voltage
0V
Reset input
voltage
0V
0.12V
CC
Power ON
(Note)
Note : Reset release voltage V
CC
= 2.7 V
Power source
voltage
detecting circuit
FFFE
16
FFFF
16
AD
H,L
AD
L
AD
H
X
IN
φ
RESET
Internal reset
Address
Data
SYNC
X
IN
2048 clock cycle
Reset address from
the vector table
Notes 1 : The frequency relation between f(X
IN
) and is f(X
IN
)=2·f( ).
2 : The mark “” means that the address is changeable depending
on the previous state.
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