MSM6442 查看數據表（PDF） - Oki Electric Industry
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MSM6442 Datasheet PDF : 12 Pages
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MSM6442
PIN DESCRIPTIONS
Pin
24 to 27
28 to 31
7 to 10
Symbol
P0.0 to P0.3
P1.0 to P1.3
P3.0 to P3.3
11 to 14 P4.0 to P4.3
33 to 48
49 to 78
80
1
21
17
20
18
19
16
15
5
4
23
22
6
32
79
SEG1 to SEG16
SEG17 to SEG46
COM1
COM2
INT
INTOUT
RESET
RESOUT
BZ
OSC0
OSC1
XT
XT
TEST1
TEST2
TEST3
VDD
LCDGND
2
VM
3
GND
Type
I/O
I/O
O
O
O
O
I
O
I
O
O
I
O
I
O
—
—
—
I
I
I/O
I
Description
Pseudobidirectional configuration input-output ports
(P1.0 is also used as count input CIN)
Pseudobidirectional configuration input-output port
LCD segment output (can be assigned to data output in 4 bits)
LCD segment output
LCD common output 1
LCD common output 2
External interrupt input pin
Interrupt request output pin
Reset input pin
Reset output pin
2048 Hz pulse output pin for buzzer
Crystal or ceramic resonator connection (system clock)
32.768 kHz crystal oscillator connection
(reference clock used for LCD control)
Testing pin 1 (open)
Testing pin 2 (open) (connected to VDD)
Testing pin 3 (open)
Power supply (5 V)
Negative power supply for LCD
(VDD–LCDGND)/2 supply voltage output or supply voltage input
Power supply (0 V)
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