PEDL66577-01

1Semiconductor

MSM66577 Family

7/34

PIN DESCRIPTIONS

In the Type column, “I” indicates an input pin, “O” indicates an output pin, and “I/O” indicates an I/O pin.

Description

Function

Symbol

Type

Primary function

Type

Secondary function

P0_0/D0 (AD0)

to

P0_7/D7 (AD7)

I/O

8-bit I/O port

10 mA sink capability

Pull-up resistors can be

specified for each individual bit

I/O

External memory access

Data I/O port

(Address output/data I/O port when

selecting a multiplexed bus)

P1_0/A8

to

P1_7/A15

I/O

8-bit I/O port

Pull-up resistors can be

specified for each individual bit

O

External memory access

Address output port

P2_0/A16

to

P2_3/A19

I/O

4-bit I/O port

Pull-up resistors can be

specified for each individual bit

O

External memory access

Address output port

P3_0/ALE

O

External memory access

Address latch enable signal

output pin

P3_1/

PSEN

O

External program memory

access

Read strobe output pin

P3_2/

RD

O

External memory access

Read strobe output pin

P3_3/

WR

I/O

4-bit I/O port

10 mA sink capability

Pull-up resistors can be

specified for each individual bit

O

External memory access

Write strobe output pin

P4_0/A0

to

P4_7/A7

I/O

8-bit I/O port

Pull-up resistors can be

specified for each individual bit

O

External memory access

Address output port

(When selecting a separate bus

type)

P5_4/CPCM0

I/O

Capture 0 input / Compare

0 output pin

P5_5/CPCM1

I/O

Capture 1 input / Compare

1 output pin

P5_6/TM0OUT

O

Timer 0 timer output pin

P5_7/TM0EVT

I/O

4-bit I/O port

Pull-up resistors can be

specified for each individual bit

I

Timer 0 external event input pin

P6_0/EXINT0

I

External interrupt 0 input pin

P6_1/EXINT1

I

External interrupt 1 input pin

P6_2/EXINT2

I

External interrupt 2 input pin

P6_3/EXINT3

I

External interrupt 3 input pin

P6_4/TM1EVT

I

Timer1 external event input pin

P6_5/TM1OUT

O

Timer 1 timer output pin

P6_6/TM2EVT

I

Timer 2 external event pin

Port

P6_7/TM2OUT

I/O

8-bit I/O port

Pull-up resistors can be

specified for each individual bit

O

Timer 2 timer output pin