PEDL66517-03

1Semiconductor

ML66517 Family

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ML66517/ML66Q517 Pin Descriptions (Continued)

Function

Symbol

Type

Description

V

DD

I

Power supply pin

Connect all V

GND

I

GND pin

Connect all GND pins to GND.*

V

REF

I

Analog reference voltage pin

Power

supply

AGND

I

Analog GND pin

OSC0

I

Main clock oscillation input pin

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

OSC1

O

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.

CLKSEL0

I

Oscillation

CLKSEL1

I

Clock multiplication factor select pin

Clock multiplication factor is selected from source oscillation (PLL

OFF), source oscillation

× 2, or source oscillation × 4

Reset

RES

I

Reset input pin

NMI

I

Non-maskable interrupt input pin

Others

EA

I

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 all address space.

*

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

power supply voltage to all V

one or more V

connected, it can not be guaranteed for normal operation.