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Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

4 Channel Audio Processor

PT2313L

DESCRIPTION

PT2313L is a four-channel digital control audio processor utilizing CMOS technology. Volume, Bass,

Balance, Front/Rear Fader Processor, Selectable Input Gain are incorporated into a single chip having

the highest performance and reliability with the least external components. All functions are

programmable using the I 2 C Bus. PT2313L is housed in 20-pin or 28-pin DIP/SOP package. The

28-pin version provides additional Two Band Tone Control and Loudness Function and is pin-to-pin

compatible with TDA7313. Pin assignments and application circuits are optimized for easy PCB layout

and cost saving advantages.

FEATURES

•

CMOS Technology

•

Least External Components

•

Treble and Bass Control (available only in the 28-pin version)

•

Loudness Function (available only in the 28-pin version)

•

3 Stereo Inputs with Selectable Input Gain

•

Input/Output for External Noise Reduction System/Equalizer

•

4 Independent Speaker Controls for Fader and Balance

Independent Mute Function

•

•

Volume Control in 1.25 dB/step

•

Low Distortion

•

Low Noise and DC Stepping

Controlled by I 2 C Bus Micro-Processor Interface

•

•

Pin-to-Pin Compatible with TDA7313 (for 28-pin version)

APPLICATIONS

•

Car Stereo (Audio)

Hi-Fi Audio System

•

•

LCD Monitor

Note: Purchase of I 2 C Component of Princeton Technology Corporation (PTC) conveys a license

under Philips I 2 C Patent. Right to use these components in any I 2 C System, provided that the system

conforms to the I 2 C Standard Specification defined by Philips.

PT2313L V2.1

- 1 -

December, 2005

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Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

4 Channel Audio Processor

PT2313L

BLOCK DIAGRAM

Speaker

ATT

LFOUT

LIN1

LIN1

R B

Mute

LIN2

LIN2

Volume

&

Loudness

Speaker

ATT

LIN3

LIN3

Bass

Treble

Input

Selector

& Gain

Control

LROUT

Mute

RIN3

RIN3

Serial Bus Decoder & Latches

RIN2

CLK

RIN2

RIN1

DATA

RIN1

DGND

Speaker

ATT

Volume

&

Loudness

Bass

Treble

RFOUT

Mute

R B

Speaker

ATT

RROUT

Supply

Mute

Note: PT2313L (20-pin version) does not provide LOUDNESS Function (LOUD_L/LOUD_R) and Tone

Control (TREB_L/TREB_R, BIN_L/BIN_R, BOUT_L/BOUT_R).

PT2313L V2.1

- 2 -

December, 2005

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Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

4 Channel Audio Processor

PT2313L

PIN CONFIGURATION

REF

VDD

AGND

RIN

ROUT

RIN3

RIN2

RIN1

LIN3

LIN2

CLK

DATA

DGND

LFOUT

RFOUT

LROUT

RROUT

LOUT

LIN

LIN1

REF

VDD

AGND

TREB_L

TREB_R

RIN

ROUT

LOUD_R

RIN3

RIN2

RIN1

LOUD_L

LIN3

LIN2

CLK

DATA

DGND

LFOUT

RFOUT

LROUT

RROUT

BOUT_R

BIN_R

BOUT_L

BIN_L

LOUT

LIN

LIN1

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

PT2313L-20

PT2313L

PT2313L V2.1

- 3 -

December, 2005

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Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

4 Channel Audio Processor

PT2313L

PIN DESCRIPTION

Pin Name

I/O

Description

Pin No.

REF

-

Analog reference voltage (1/2VDD)

1

VDD

-

Supply input voltage

2

AGND

-

Analog ground

3

TREB_L

I

Left channel input for treble controller

4

TREB_R

I

Right channel input for treble controller

5

RIN

I

Audio processor right channel input

6

ROUT

O

Gain output and input selector for right channel

7

LOUD_R

I

Right channel loudness input

8

RIN3

I

Right channel input 3

9

RIN2

I

Right channel input 2

10

RIN1

I

Right channel input 1

11

LOUD_L

I

Left channel loudness input

12

LIN3

I

Left channel input 3

13

LIN2

I

Left channel input 2

14

LIN1

I

Left channel input 1

15

LIN

I

Audio processor left channel input

16

LOUT

O

Gain output and input selector for left channel

17

BIN_L

I

Left channel input for bass controller

18

BOUT_L

O

Left channel output for bass controller

19

BIN_R

I

Right channel input for bass controller

20

BOUT_R

O

Right channel output for bass controller

21

RROUT

O

Right rear speaker output

22

LROUT

O

Left rear speaker output

23

RFOUT

O

Right front speaker output

24

LFOUT

O

Left front speaker output

25

DGND

-

Digital ground

26

DATA

I

Control data input

27

CLK

I

Clock input for serial data transmission

28

PT2313L V2.1

- 4 -

December, 2005

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Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

4 Channel Audio Processor

PT2313L

I 2 C BUS INTERFACE FUNCTION DESCRIPTION

BUS INTERFACE

Data are transmitted to and from the microprocessor to the PT2313L via the DATA and CLK. The

DATA and CLK make up the BUS Interface. It should be noted that the pull-up resistors must be

connected to the positive supply voltage.

DATA VALIDITY

A data on the DATA Line is considered valid and stable only when the CLK Signal is in HIGH State. The

HIGH and LOW States of the DATA Line can only change when the CLK signal is LOW. Please refer to

the figure below.

DATA

CLK

DATA LINE

STABLE,

DATA VALID

DATA

CHANGE

ALLOWED

START AND STOP CONDITIONS

A Start Condition is activated when

1. the CLK is set to HIGH and

2. DATA shifts from HIGH to LOW State.

The Stop Condition is activated when

1. CLK is set to HIGH and

2. DATA shifts from LOW to HIGH State.

Please refer to the timing diagram below.

CLK

DATA

START

STOP

PT2313L V2.1

- 5 -

December, 2005

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