au1564a Aplus Integrated circuits Inc., au1564a Datasheet - Page 3

• Manufacturer Part Number: au1564a
• Description: Single Chip Voice Synthesizer With 4-bit Microprocessor
• Manufacturer: Aplus Integrated circuits Inc.

General Description:
with 4-bit microprocessor. That can synthesize voice up to 15, 20 seconds by ALPHA
qualified coding algorithm (LOGPCM).
The 4-bit microprocessor has various feature including 4-bit ALU, 1K×15 bits ROM, 64×4 bits
RAM, I/O port, timer, clock generator, LCD driver, etc. The instruction set with 78 instructions.
With the half function can minimize power dissipation.
Features:
10. One 4-bit output port
11. One control output pins
12. 78 instructions
13. 4-level subroutine nesting (also used for interrupt)
14. Two external factors (INT, S & M port) for interrupt
15. Two internal factors (Timer , Divider) for interrupt
16. Three current output level 1.5mA, 3mA, 4.5mA is mask option (full scale).
Block Diagram :
The AU1564, AU1564A, AU2064,
4. Current output could drive 8 ohm speaker with a transistor, VOUT could drive buzzer or
5. LCD driver provided, up to 3× 24=72 segments. Build-in HALVER circuitry.
6.
1. Single power supply can operate from 2.4V through 6V
2. The total voice duration is about 15, 20 seconds could be partitioned up to 64 sections
3. The voice can be triggered by microprocessor instructions
7. Internal ROM: 1024×15 bits
8. Two 4-bit input ports (AU1564, AU1564A has no S4 pad)
9. Two 4-bit I/O ports
(AU1564, AU1564A has no COUT output function)
Internal RAM: 64×4 bits
(AU1564, AU1564A -->15 seconds, AU2064, AU2064A -->20 seconds)
Build-in clock generator
64 ohm directly.
AU2064A
is a single chip voice synthesizer
2
AU Series
Rev 2.0