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MSM64158A Datasheet(PDF) 6 Page - OKI electronic componets

Part No. MSM64158A
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

MSM64158A Datasheet(HTML) 6 Page - OKI electronic componets

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¡ Semiconductor
MSM64158A/64158AL
PIN DESCRIPTIONS
Basic Functions
Function
Symbol
Pad
Description
Power
Supply
VDD
58
Digital power supply (0 V)
VSS1
47
Digital negative power supply (for 1.5 V spec.)
Bias output for LCD drive (for 3.0 V spec.)
VSS2
46
Digital negative power supply (for 3.0 V spec.)
Bias output for LCD drive (for 1.5 V spec.)
VSS3
45
Bias output for LCD drive (–4.5 V)
C1
44
Capacitor connection pins for LCD drive bias generation.
C2
43
VSSL
50
Negative power supply pin for internal logic
(An internally generated constant voltage is present at this pin.)
OSC0
48
Clock oscillation input and output 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.
OSC1
49
TST1
64
Input pins for test.
TST2
63
RESET
51
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.
Oscillation
Test
Reset
Type
I
O
I
I
I
Pin
44
33
32
31
30
29
36
34
35
50
49
37


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