MSM65522-XXXRS データシートの表示（PDF） - Oki Electric Industry

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MSM65522-XXXRS

8-Bit Microcontroller with A/D Converter

Oki Electric Industry 

¡ Semiconductor

MSM65522/65P522

PIN DESCRIPTION

Basic Functions

Function

Power

Supply

Symbol

VDD

GND

OSC0

Type

—

—

I

Oscillation

OSC1

O

RESET

I

Control

TEST

I

P0.0

I/O

to

P0.7

P1.0

I/O

to

P1.3

P2.0

I/O

Port

to

P2.7

P3.0

I/O

to

P3.7

P6.0/AI0

I

to

P6.7/AI7

Description

+5V digital power supply (common to analog power supply)

0V digital ground (common to analog ground)

Oscillator input pin: connects to a crystal oscillator (or ceramic resonator)

or external clock. The master clock and external clock are used as the

system clock without frequency division.

Oscillator input pin: connects to a crystal oscillator (or ceramic resonator).

When an external clock is input to OSC0, leave OSC1 open.

System reset input: when this pin goes low, the internal state of the chip

is initialized and program execution restarts from address 0040H. The

input is pulled up to VDD with an internal pull-up resistor.

Test input pin: connects to ground pin.

8-bit input/output port (Port 0)

8-bit input/output port (Port 1)

8-bit input/output port (Port 2): input or output can be selected for each

bit by the port 2 direction register (P2DIR). In addition to their input/

output port functions, the pins of port 2 have secondary functions: see

the next table.

8-bit input/output port (Port 3): input or output can be selected for each

bit by the port 3 direction register (P3DIR). In addition to their input/

output port functions, the pins of port 3 have secondary functions: see

the next table.

8-bit input port (Port 6):

Functions as analog input channel during A/D conversion.

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