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.