SNC710

16-bit Voice Engine

4.4 I/O Port

SNC710 provides one a 16-bit I/O port and an 8-bit input port for user application

(P0.0~P0.15, P1.0~P1.7). The input pull high resistor of each pin can be programmed

by Port Pull-High register. The direction of I/O port is selected by Port Direction

register. The Port0 (P0.0~P0.15) and Port1 (P1.0~P1.7) can wake the chip up from the

stop mode and watch mode. And P0.15 Modulated with a carry signal

Pull-Up

Resister

Latch

PAD

to internal bus

Pull-Up

Select

In/Out

Control

In/Out

Control

I/O Configuration of P0.0~P0.15

Digital In

Input Control

Pull-Up Select

PAD

Pull-Up

Resister

Input Port Configuration of Port 1 (P1.0~P1.7)

Ver. 1.3

April 3, 2003

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