
W528X
ADPCM VOICE SYNTHESIZER
(PowerSpeech)
Publication Release Date: May 1997
Revision A6
- 1 -
GENERAL DESCRIPTION
The W528X family are programmable speech synthesis ICs that utilize the ADPCM coding method to
generate all types of voice effects.
The W528X's LOAD and JUMP commands and four programmable registers provide powerful user-
programmable functions that make this chip suitable for an extremely wide range of speech IC
applications.
The W528X family includes the W5281, W5282, W5283, W5284, W5289, W5285, W5286, W5287,
and W5288. The ROM size of each of these products is shown below:
BODY
W5281
W5282
W5283
W5284
W5289
W5285
W5286
W5287
W5288
Second
3 Sec
6 Sec
9 Sec
12 Sec
16 Sec
20 Sec
30 Sec
40 Sec
60 Sec
Note: All of the playback lengths are estimated by typical applications.
FEATURES
Programmable speech synthesizer
Wide operating voltage range: 2.4 to 5.0 volts
4-bit ADPCM synthesis method
Provides 4 direct trigger inputs that can easily be extended to 8 or 12 matrix trigger inputs
Two trigger input debounce times (20 to 40 mS or 160 to 320
μ
S) can be set
Provides up to 2 LEDs and 3 STOP outputs
Every LED pin can drive 3 LEDs simultaneously
LED flash frequency: 3 Hz
AUD output current: 5 mA
Flexible functions programmable through the following:
LD (load), JP (jump) commands
Four registers: R0, EN, STOP, and MODE
Conditional instructions
Speech equation
END instruction
Global repeat (GR) setting
Output frequency and LED flash type setting
Programmable power-on initialization (POI) (can be interrupted by trigger inputs)
POI delay time of 160 mS ensures stable voltage when chip is powered on
Can be programmed for the following functions: