¡ Semiconductor

MSM63188A

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PIN DESCRIPTIONS

The basic functions of each pin of the MSM63188A are described in Table 1.

A symbol with a slash (/) denotes a pin that has a secondary function.

Refer to Table 2 for secondary functions.

For type, "—" denotes a power supply pin, "I" an input pin, "O" an output pin, and "I/O" an input-

output pin.

Table 1 Pin Descriptions (Basic Functions)

Function Symbol

Pin

Type

73

—

62

—

63

64

65

—

66

Power

Supply

67

C1

68

—

C2

69

—

87

—

74

—

70

—

CB1

71

—

CB2

72

—

XT0

79

I

Oscillation

XT1

78

O

OSC0

76

I

OSC1

75

O

Test

TST1

81

I

TST2

80

I

Reset

RESET

77

I

Melody

MD

84

O

MDB

85

O

Description

Positive power supply

Negative power supply

Power supply pins for LCD bias (internally generated).

Capacitors (0.1

mF) should be connected between these pins and

Capacitor connection pins for LCD bias generation.

A capacitor (0.1

mF) should be connected between C1 and C2.

Positive power supply pin for external interface

(power supply for input, output, and input-output ports)

Positive power supply pin for internal logic (internally generated).

A capacitor (0.1

Voltage multiplier pin for power supply backup (internally generated).

A capacitor (1.0

Pins to connect a capacitor for voltage multiplier.

A capacitor (1.0

mF) should be connected between CB1 and CB2.

Low-speed clock oscillation pins.

A 32.768 kHz crystal should be connected between XT0 and XT1,

High-speed clock oscillation pins.

Input pins for testing.

A pull-down resistor is internally connected to these pins.

The user cannot use these pins.

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 0000H.

A pull-down resistor is internally connected to this pin.

Melody output pin (non-inverted output)

Melody output pin (inverted output)