參數(shù)資料
型號: M34512M4
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機的CMOS
文件頁數(shù): 4/80頁
文件大?。?/td> 760K
代理商: M34512M4
4
4512 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
PIN DESCRIPTION
Pin
V
DD
V
SS
N.F
CNV
SS
RESET
Name
Power supply
Ground
No Function
CNV
SS
Reset input
System clock input
System clock output
I/O port D
I/O port P0
I/O port P1
Input port P2
Analog input
Interrupt input
Serial data input
Serial data output
Serial I/O clock
input/output
X
IN
X
OUT
D
0
–D
7
P0
0
–P0
3
P1
0
–P1
3
P2
0
–P2
2
A
IN0
–A
IN3
INT0, INT1
S
IN
S
OUT
S
CK
Input/Output
I/O
Input
Output
I/O
I/O
Input
Input
Input
Input
Output
I/O
Function
Connected to a plus power supply.
Connected to a 0 V power supply.
This pin has no function, and connect to V
SS
as an unused pin.
Connect CNV
SS
to V
SS
and apply “L” (0V) to CNV
SS
certainly.
An N-channel open-drain I/O pin for a system reset. When the watchdog timer
causes the system to be reset, the RESET pin outputs “L” level.
I/O pins of the system clock generating circuit. X
IN
and X
OUT
can be connected to
ceramic resonator. A feedback resistor is built-in between them.
Each pin of port D has an independent 1-bit wide I/O function. Each pin has an out-
put latch. For input use, set the latch of the specified bit to “1.” Input is examined by
skip decision. The output structure is N-channel open-drain.
Each of ports P0 and P1 serves as a 4-bit I/O port, and it can be used as inputs
when the output latch is set to “1.” The output structure is N-channel open-drain.
Every pin of the ports has a key-on wakeup function and a pull-up function. Both
functions can be switched by software.
3-bit input port. Ports P2
0
, P2
1
and P2
2
are also used as S
CK
, S
OUT
and S
IN
, respec-
tively.
Analog input pins for A-D converter.
INT0, INT1 pins accept external interrupts. They also accept the input signal to re-
turn the system from the RAM back-up state.
S
IN
pin is used to input serial data signals by software.
S
IN
pin is also used as port P2
2
.
S
OUT
pin is used to output serial data signals by software.
S
OUT
pin is also used as port P2
1
.
S
CK
pin is used to input and output synchronous clock signals for serial data transfer
by software. S
CK
pin is also used as port P2
0
.
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