AVxx08 Series

Rev 1.3

2003/9/18

5

3. BLOCK DIAGRAM:

4. PAD DESCRIPTION:

Pad Name

Pad No.

ATTR.

Function

IO1

1

I/O

Status output or input for trigger.

TG

2

I

Input for trigger.

GND1, 2

3, 7

Power

Negative power supply.

PWM1

4

O

Audio output.

Vdd

5

Power

Positive power supply.

PWM2

6

O

Audio output.

OSC

8

I

Oscillator input. For using internal oscillator, connect OSC to GND.

5. CODE DEVELOPMENT & DEMO SYSTEM:

User can use “EzSpeech“ software tool to develop the desired functions. For details, please see EzSpeech

user manual. After finishing the code programming, user will get 2 files of “.bin” and “.htm”, the binary file

and function check list. User can download the “.bin” file into 4EA_DB demo board to demonstrate the

AVxx08 function. The related mapping of 4EA_DB is as below,

AVxx08

4EA_DB

4EA_DB

Description

TG

PRA0

PRA0 performs TG input.

IO1 as Input

PRA1

PRA1 performs IO1 input mode.

IO1 as Output

PRB0

PRB0 performs IO1 output mode.

PWM1, PWM2

PWM1, PWM2

PWM output to directly drive speaker.

I/O Pin

OSC

OSC1

OSC1 connect 150K ohms resistor to Vdd.

For some input type option, user may need to connect an external resistor. Please refer to the table below,

AVxx08

4EA_DB

4EA_DB

Description

CDS + 1M

CDS + 1M

The same.

CDS

CDS + 1M

Almost the same.

1M pull-low

Floating

Need to connect 1M external resistor to GND.

10M pull-low

Floating

Need to connect 10M external resistor to GND.

Input

Type

Floating

Floating

The same.

Once the function has been approved, user only need to send the “.bin” file to Aplus for code tape-out.

VOICE

ROM

TIMING

GENERATOR

C

O

N

T

R

O

L

L

O

G

I

C

TG

IO1

CLOCK

GENETATOR

4-bit LOG_PCM

DECODER

OUTPUT

BUFFER

P

W

M

1

P

W

M

2

OSC

VOICE

ROM

TIMING

GENERATOR

C

O

N

T

R

O

L

L

O

G

I

C

TG

IO1

CLOCK

GENETATOR

4-bit LOG_PCM

DECODER

OUTPUT

BUFFER

P

W

M

1

P

W

M

2

OSC