4

PIN DESCRIPTIONS

Name

I/O

Function

TG8

I

Trigger Switch 8, Internal Pull LOW,

Active HIGH

O

Drives First LED Flash at 3 Hz,

Active LOW

O

PWM Audio Signal Output for

Buzzer

O

Compliment PWM Audio Signal

Output for Buzzer

GND

-

Power Ground

STP/BUSY

O

Generate 30 ms Pulse or Busy

Signal After Voice Playback

O

Drives Second LED Flash at 3 Hz,

Active LOW

O

Current Output from Internal DAC

for Speaker Playback

OSC

I

Oscillator Resistor Pin to Control

Sampling Frequency

TG5

I

Trigger Switch 5, Internal Pull LOW,

Active HIGH

TG6

I

Trigger Switch 6, Internal Pull LOW,

Active HIGH

-

Program Power Supply, No

Connect When Voice Playback

TG1

I

Trigger Switch 1, Internal Pull LOW,

Active HIGH

TG2

I

Trigger Switch 2, Internal Pull LOW,

Active HIGH

-

Positive Power Supply

TG3

I

Trigger Switch 3, Internal Pull LOW,

Active HIGH

TG4

I

Trigger Switch 4, Internal Pull LOW,

Active HIGH

SBT

I

One Key or Sequential Trigger,

Internal Pull LOW, Active HIGH

IRP

I

Interrupt to Stop Playback, Internal

Pull LOW, Active HIGH

TG7

I

Trigger Switch 7, Internal Pull LOW,

Active HIGH

Note:

1. The following pins are used to program data into the memory on the chip:

pins 5, 6, 7, 9, 12, 15, 18 and 19.

PIN CONFIGURATION

20-Pin 300-mil PDIP

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

TG8

LED1

GND

STP

LED2

OSC

TG5

TG7

IRP

SBT

TG4

TG3

TG2

TG1

TG6

APLUS

API840N

LED 1

LED 2