General Description:

The AU1564, AU1564A, AU2064, AU2064A is a single chip voice synthesizer 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:

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

(AU1564, AU1564A -->15 seconds, AU2064, AU2064A -->20 seconds)

3. The voice can be triggered by microprocessor instructions

4. Current output could drive 8 ohm speaker with a transistor, VOUT could drive buzzer or

64 ohm directly.

5. LCD driver provided, up to 3× 24=72 segments. Build-in HALVER circuitry.

6. Build-in clock generator

7. Internal ROM: 1024×15 bits

Internal RAM: 64×4 bits

8. Two 4-bit input ports (AU1564, AU1564A has no S4 pad)

9. Two 4-bit I/O ports

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).

(AU1564, AU1564A has no COUT output function)