SNC207S

Direct Drive Speech Controller

Ver: 0.3

Sept 20, 2007

5

5.6. Event Mark

This is a new function for SNC207S, it allows user to add a special mark in wave data

by the voice edit tool “CoolEdit”. User can insert event tags in anywhere of his wave

file and can easy to get this special code to do his special action during voice playing.

That means, it should be easily to control the I/O (such as LED or motor) and other

actions to synchronize with voice.

5.7. I/O Ports

P30~P33 and P20~P21 are I/O pins. Any bit of them can be programmed as either

input or output port individually. Any valid data transition (H

L or L

H) of P30~P33

and P20~P21 can reactivate the chip when the chip is in power-down mode.

I/O Port Configuration (P30~P33, P20~P21)

Note:

(1) Weak N-MOS’s can serve as pull-low resistors.

(2) The driving and sink current of P3.2 and P3.3 are enhance to be 8mA/16mA.

So user can direct to drive the LED through those two I/O pins.

Port Data

Port Status

To Internal Data Bus

Read Control

PAD

Weak