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参数资料
| 型号： | M38222M9FP |
| 厂商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 4/78页 |
| 文件大小： | 998K |
| 代理商： | M38222M9FP |
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4
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
3822 Group
MITSUBISHI MICROCOMPUTERS
PIN DESCRIPTION
Table 1 Pin description (1)
V
CC
, V
SS
Function
Pin
Name
Function except a port function
LCD segment output pins
Power source
Apply voltage of power source to V
CC
, and 0 V to V
SS
. (For the limits of V
CC
, refer to
“
Recom-
mended operating conditions
”
).
V
REF
AV
SS
RESET
X
IN
X
OUT
V
L1
–
V
L3
COM
0
–
COM
3
SEG
0
–
SEG
11
P0
0
/SEG
16
–
P0
7
/SEG
23
P1
0
/SEG
24
–
P1
7
/SEG
31
P2
0
–
P2
7
P3
4
/SEG
12
–
P3
7
/SEG
15
Analog refer-
ence voltage
Analog power
source
Reset input
Clock input
Clock output
LCD power
source
Common output
Segment output
I/O port P0
I/O port P1
I/O port P2
Reference voltage input pin for A-D converter.
GND input pin for A-D converter.
Connect to V
SS
.
Reset input pin for active
“
L
”
.
Input and output pins for the main clock generating circuit.
Feedback resistor is built in between X
IN
pin and X
OUT
pin.
Connect a ceramic resonator or a quartz-crystal oscillator between the X
IN
and X
OUT
pins to set
the oscillation frequency.
If an external clock is used, connect the clock source to the X
IN
pin and leave the X
OUT
pin open.
This clock is used as the oscillating source of system clock.
Input 0
≤
V
L1
≤
V
L2
≤
V
L3
≤
V
CC
voltage.
Input 0
–
V
L3
voltage to LCD.
LCD common output pins.
COM
2
and COM
3
are not used at 1/2 duty ratio.
COM
3
is not used at 1/3 duty ratio.
LCD segment output pins.
8-bit output port.
CMOS compatible input level.
CMOS 3-state output structure.
I/O direction register allows each port to be individually
programmed as either input or output.
Pull-down control is enabled.
8-bit I/O port.
CMOS compatible input level.
CMOS 3-state output structure.
I/O direction register allows each pin to be individually
programmed as either input or output.
Pull-up control is enabled.
4-bit input port.
CMOS compatible input level.
Pull-down control is enabled.
Key input (key-on wake-up) interrupt
input pins
LCD segment output pins
Input port P3
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