PIN DESCRIPTIONS

Pin NO.

I/O

Symbol

Function

1

I

P1.2/OEB/Mode option

Bit 2 of Port 1 / Program control signal

2

I

P1.1/PGMB/Mode option

Bit 1 of Port 1 / Program control signal

3

I

P1.0

Bit 0 of Port 1

4

I

VSS

Negative power supply.

5

I

OSC/ACLK

Oscillation component connection pin /

Program control signal

6

I

TEST/Vpp

Test/Programing.

7

O

VO2

Voice output.

8

VO1

No connect

9

I

VDD

Positive power supply.

10

I/O

P3.3

Bit 3 of Port 3.

11

I/O

P3.2

Bit 2 of Port 3.

12

I/O

P3.1

Bit 1 of Port 3.

13

I/O

P3.0

Bit 0 of Port 3.

14

I/O

P2.3

Bit 3 of Port 2.

15

I/O

P2.2

Bit 2 of Port 2.

16

I/O

P2.1/Dout

Bit 1 of Port 2 / Program data output signal

17

I/O

P2.0/Din

Bit 0 of Port 2 / Program data input signal

18

I/O

P1.3/Din.out.clk/Mode option

Bit 3 of Port 1 / Program control signal

GENERAL DESCRIPTION

API820G is a tiny-controller-based voice synthesizer IC which contains all the function of API820G series

and has an OTP (One Time Programmable) ROM inside.

FEATURES

• API820G – ROM : 64k x 10 bits (21 sec@6K sample rate).

• Single power supply 2.4V ~ 5.5V.

• Port1 and Port2 with wake-up function.

• Power down mode for saving power consumption.

• Single ROM for voice and program data.

• Readable ROM code data.

• One 6-bit timer overflow control.

• Two stacks for subroutine calling.

• Fixed current D/A to drive external connected transistor for audio output.

• 5-bit ASPCM synthesizer.

• Multiple levels of volume control.

• Multiple playing sppeeds in 2KHz ~ 32KHz for voice playback.

1

API 820G

• Multiple playing sppeeds in 2KHz ~ 32KHz for voice playback.