HT81R03-00 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT81R03-00

EasyVoice™ 3-Second Speech

Holtek Semiconductor 

Preliminary

HT81003/HT81R03

AUD

AUD

FLA G

: F lo a tin g

· 6Hz/6HzB flash

When voices are playing, the FLAG1 pin

outputs a 6Hz signal to drive a LED. The

signal is active low, 25% duty. Once the voice

output is terminated, the FLAG1 pin be-

comes a floating output. When the FLAG1

and the FLAG2 pins are optioned as 6HzB

and 6Hz outputs, they will alternately out-

put at a 6Hz rate.

AUD

FLA G

: F lo a tin g

· Busy output

When a voice group is playing, the outputs of

both FLAG1 and FLAG2 are turned low, indi-

cating that the chip is busy.

AUD

FLA G

: F lo a tin g

In addition to the above-stated output sig-

nals, FLAG1 can also generate one of the fol-

lowing signals by code option:

¨ End-pulse output

When the voice output is completed, the

FLAG1 pin outputs an active low pulse. The

pulse width can be programmed depending

on the customer¢s requirements.

The FLAG1 as well as FLAG2 pins are both

floating outputs when the chip is in the

standby state.

FLA G

: F lo a tin g

Volume control

The function of the volume control can be set by

mask option. A code is written in the function

table for the purpose of controlling the volume

of each section output after the volume control

function is chosen. There are two volume op-

tions, namely; full range and half range.

I/O2

The I/O2 pin is a PWM structure. It outputs

voice signals to drive a speaker through an ex-

ternal NPN transistor when the chip is active.

The OUT1 and OUT2 pins are configured as

PWM structure which can drive 8/16/32W

speaker directly.

An 8050 type transistor with hFE@150 is recom-

mended for an output driver.

O SC I O U T1

R O SC

SPK

O U T2

H T 8 1 0 0 3 /H T 8 1 R 0 3

V DD

SPK

O S C I I/O 2

R O SC

H T 8 1 0 0 3 /H T 8 1 R 0 3

8

July 24, 2000

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