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MSM6576

¡ Semiconductor

PIN DESCRIPTIONS

Symbol

Type

Description

PORT0

(P0.0 to P0.3)

I/O

4-bit input-output port, I/O switchable, input pull-down resistor/pull-up resistor

switchable, with/without input resistor

I/O

4-bit input-output port, I/O switchable, with/without input pull-down resistor

I/O

4-bit input-output port, I/O switchable,

with/without input pull-down resistor

I/O

4-bit input-output port, I/O switchable, with/without input pull-down resistor

I/O

4-bit input-output port, I/O switchable, with/without input pull-down resistor

I/O

4-bit input-output port, I/O switchable, with/without input pull-down resistor

I/O

4-bit input-output port, I/O switchable,

with/without input pull-down resistor

P7.0: Input port, without input resistor

BD

O

Buzzer output pin

RESET

I

Reset pin with input pull-down resistor

TEST1

Testing pins with input pull-down resistor

Tie to the negative pole of the battery.

TEST2

I

TEST3

XT

I

Connection pins for crystal

XTB

O

—

0 V power supply pin

—

–1.5 V supply pin (power supply pin for –1.5 V operation)

—

–3.0 V supply pin (power supply pin for –3.0 V operation)

—

Connection pins for internal potential development capacitor

PORT1

(P1.1 to P1.3)

PORT2

(P2.0 to P2.3)

PORT3

(P3.0 to P3.3)

PORT4

(P4.0 to P4.3)

PORT5

(P5.0 to P5.3)

PORT6

(P6.0 to P6.3)

P2.0 to P2.3

External interrupt

port

P6.3: SOUT

Shared with serial

port

I

PORT7

(P7.0 to P7.3)

—

Supply pin for internal logic (constant voltage circuit output pin)

P6.2: SCLK

P7.1: Input pin for level detector

P7.2: Input pin for comparator

P7.3: Input pin for comparator

P7.0: SIN