MSM66577 datasheet(9/34 Pages) OKI

9 / 34 page

PEDL66577-01

1Semiconductor

MSM66577 Family

9/34

Function

Symbol

Type

Description

Power supply pin

Connect all V

DD pins to the power supply.*

GND

GND pin

Connect all GND pins to GND.*

REF

Analog reference voltage pin

Power

supply

AGND

Analog GND pin

XT0

Sub clock oscillation input pin

Connect to a crystal oscillator of f = 32.768 kHz.

XT1

Sub clock oscillation output pin

Connect to a crystal oscillator of f = 32.768 kHz.

The clock output is opposite in phase to XT0.

OSC0

Main clock oscillation input pin

Connect to a crystal or ceramic oscillator. Or, input an external

clock.

Oscillation

OSC1

Main clock oscillation output pin

Connect to a crystal or ceramic oscillator.

The clock output is opposite in phase to OSC0.

Leave this pin unconnected when an external clock is used.

Reset

RES

Reset input pin

NMI

Non-maskable interrupt input pin

External program memory access input pin

If the

EA pin is enabled (low level), the internal program memory is

masked and the CPU executes the program code in external

program memory through all address space.

Other

SELMBUS

SELMBUS = H: Address/data separate bus type

SELMBUS = L: Multiplexed bus type

* Each of the family devices has unique pattern routes for the internal power and ground. Connect the

power supply voltage to all V

DD pins and the ground potential to all GND pins. If a device may have one

or more V

DD or GND pins to which the power supply voltage or the ground potential is not connected, it

can not be guaranteed for normal operation.

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