UT912D

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

4

www.unisonic.com.tw

QW-R502-044,A

OPERATION FLOWCHART

The oscillator is disabled in the standby state and activated when a logic “high” signal applies to the DIN pin.

That is to say, the DIN should be kept low if there is no signal input.

Power

on

Standby

mode

Code in ?

Match

previous stored

data ?

3 times

of checking

completed?

No

Yes

Yes

Yes

Address bits

matched ?

ignore the rest of

this word

No

Store data

Latch data

to output &

Address or

data error ?

Yes

No

No

No

Yes