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MSM64155A Datasheet(PDF) 6 Page - OKI electronic componets

Part No. MSM64155A
Description  4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit
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Manufacturer  OKI [OKI electronic componets]
Direct Link  http://www.oki.com
Logo OKI - OKI electronic componets

MSM64155A Datasheet(HTML) 6 Page - OKI electronic componets

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MSM64155A/64155AL
¡ Semiconductor
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PIN DESCRIPTIONS
Basic Functions
Pad
Power
Supply
Pin
Digital supply voltage (0 V)
Description
Type
21
Function
Oscillation
Test
RESET
23
100
99
98
97
96
4
97
96
95
94
93
2
Digital negative power supply (1.5 V spec.)
Bias output for LCD driver (3.0 V spec.)
Digital negative power supply (3.0 V spec.)
Bias output for LCD driver (1.5 V spec.)
Bias output for LCD driver (–4.5 V)
For connection to capacitors that generate bias for the
LCD driver
Negative power supply voltage pin for internal logic
(An internally generated constant voltage is present at this pin.)
Clock oscillation pins:
Either a crystal (32.768 kHz) and a capacitor (10 to 30 pF)
are connected to these pins or a resistor (1 MW) is.
2
3
99
1
I
O
30
29
28
28
27
26
I
I
I
Input pins for test
198
I
System reset input pin :
Setting this pin to "H" level puts this device into a reset state.
Then, setting this pin to "L" level starts executing an instruction
from address 000H.
This pin is internally connected to VSS1 or VSS2 through a
pull-down resistor.
Symbol
VDD
VSS1
VSS2
VSS3
C1
C2
VSSL
OSC0
OSC1
TST1
TST2
TST3
RESET


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