Integrated Circuits Inc.

aP8842

Ver 1.3

6

Pin Description

Pin No.

Name

I/O/P

Function

1

S8

I

Trigger switch 8, internal pull low, active high

2

OUT1

O

Programmable output 1

3

O

PWM audio signal output 1 for buzzer & speaker

4

O

PWM audio signal output 2 for buzzer & speaker

5

P

Power ground

6

OUT2

O

Programmable output 2

7

OUT3

O

Programmable output 3

8

O

Current output from internal DAC for speaker playback

9

OSC

I

Oscillator resistor pin to control sampling frequency

10

S5

I

Trigger switch 5 / CPU Addr.5 ( MSB ),

11

S6

I

Trigger switch 6, internal pull low, active high

12

VPP

P

Program power, must connect to VDD when playback

13

S1

I

Trigger switch 1 / CPU Addr.1 ( LSB ),

internal pull low, active high

14

S2

I

Trigger switch 2 / CPU Addr.2,

internal pull low, active high

15

P

Positive power supply

16

S3

I

internal pull low, active high

17

S4

I

internal pull low, active high

18

SBT

I

Key Sequential/CPU trigger, internal pull low, active

high

19

IRP

I

Interrupt to stop playback, internal pull low, active high

20

S7

I

Trigger switch 7, internal pull low, active high

Note1: The following pins are used to program data into the memory: 5 – 7 and 9 - 20.

Note2: Vpp and Vcc MUST be connected to positive power supply during normal playback. However, they MUST be

separated during data programming.