Integrated Circuits Inc.

aP89021/010

Ver 2.2

May 31, 2007

4

PIN DESCRIPTIONS

S1 ~ S4

Input Trigger Pins:

- S1 to S4 are used to trigger the 12 Voice Groups in both Key and CPU Parallel Trigger Mode.

- In OTP Programming Mode, S1 to S4 are used as program enable pins.

SBT

Input Trigger Pin:

- In Key Trigger Mode, this pin is trigger pin to trigger the playback of Voice Groups one by one

sequentially.

- In CPU Parallel Command Mode, this pin is used as address strobe to latch the input from S1 to

S4 and starts the voice playback.

- In OTP Programming Mode, this pin is used as PGM signal.

VDD

Power Supply Pin.

VSS

Power Ground Pin

VOUT1 and VOUT2

Digital PWM output pins which can drive speaker and buzzer directly for voice playback.

OSC

During voice playback, an external resistor is connected between this pin and the VDD pin to set the

sampling frequency. In OTP Programming Mode, this is the ACLK input signal.

VPP

Connection to VDD is required during voice playback. In OTP Programming Mode, this pin is

connected to a separate 6.5V power supply.

OUT1, OUT2 and OUT3

- In Key Trigger Mode and CPU Parallel Command Mode, these pins are user programmable pins

for the STOP pulse, BUSY and LED signals.

- During OTP programming, OUT1 serves as OEB while OUT2 serves as data IO.

COUT

Analog 8-bit current mode D/A output for voice playback

RST

Chip reset in playback mode or DCLK pin in OTP programming mode.