HT81003 datasheet(4/11 Pages) HOLTEK

4 / 11 page

Electrical Characteristics

Ta=25°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

¾¾

2.4

3.6

IDD

Operating Current

3V No load (OSC on)

1000

1200

ISTB

Standby Current

¾¾

IOL1

OUT1 (PWM+)

PWM Output Current

3V VOL=0.1VDD

IOH1

3V VOH=0.9VDD

IOL2

I/O2 (TR)

Tr Output Current

3V VOL=0.1VDD

IOH2

3V VOH=0.9VDD

-1

-2

IOL3

I/O1 (FLAG Sink Current) 3V VOL=0.1VDD

VIH

²H² Input Voltage

¾¾

0.8VDD

VDD

VIL

²L² Input Voltage

¾¾

0.2VDD

HT81003/HT81R03

July 24, 2000

Preliminary

Functional Description

The EasyVoiceTM is voice synthesizer with

3-second voice capacity. A group of pre-recorded

voice sections is played upon receipt of key trigger

input signals. Two FLAG signals are output

while playing voices.

The 3-sec voice capacity can be divided into sec-

tions of arbitrary length. Notice that the silence

length and end-pulse width are not included in

the memory.

By using Holtek¢s programming tools, the con-

tents and arrangement of sections, as well as

key features and FLAG output are all program-

mable before device fabrication.

The IC provides 2 key inputs (KEY1~KEY2),

KEY1 can be optioned as a direct, sequential

trigger key. Key 2 can be selected as a stop or a

direct key.

Play function block diagram

Ke y

t r i gger

Ke y

f eat ur es

opt i o n

Ke y

fu nc t i o n

t abl e

RO M

Vo i c e

RO M

Se l e c t

P l ay c ont r ol l ogi c

Fl a g

out p u t

V DD

8 W

s peak er

PW M +

PW M -

8/ 16 / 3 2 W

s peak er

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