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General Description
The NJU26207 is a digital signal processor that provides the function of Dolby Volume.
Dolby Volume solves volume level difference among channels, input sources and etc.
The mix balance is reproduced by high or low volume level.
The applications of NJU26207 are suitable for Digital TV, Front Surround Speaker and
speakers system.
Features
-Software
Dolby Volume (512FFT Window / 20Band)
Delay
Master Volume / Balance Control
Sampling Frequency : 32kHz, 44.1kHz, 48kHz
2 Input channels, 2 Output channels
-Hardware
24bit Fixed-point Digital Signal Processing
Maximum Clock Frequency
Digital Audio Interface
Digital Audio Format
Master / Slave Mode
Microcomputer Interface
2
I
C Bus (Standard-mode/100kbps, Fast-mode/400kbps)
4-Wire Serial Bus (4-Wire: Clock, Enable, Input data, Output data)
Operating Voltage
Input Terminal
Package
* The detail hardware specification of the NJU26207 is described in the " NJU26200 Series Hardware Data Sheet".
Ver.2008-12-03
Dolby Volume Decoder
: 12.288MHz(Standard), built-in PLL Circuit
: 4 Input ports / 3 Output ports
2
: I
S 24bit,
left-justified,
: V
= V
= 1.8V
DD
DDPLL
: V
= 3.3V
DDIO
: +5.0V Input tolerant
: SSOP44 (Pb-Free)
right-justified,
BCK : 32fs/64fs
NJU26207
■
Package
NJU26207V
- 1 -
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Table of Contents
Related Manuals for JRC DOLBY NJU26207
Summary of Contents for JRC DOLBY NJU26207
- Page 1 NJU26207 Dolby Volume Decoder General Description ■ Package The NJU26207 is a digital signal processor that provides the function of Dolby Volume. Dolby Volume solves volume level difference among channels, input sources and etc. The mix balance is reproduced by high or low volume level. The applications of NJU26207 are suitable for Digital TV, Front Surround Speaker and speakers system.
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Page 2: Hardware Block Diagram
NJU26207 Hardware Block Diagram AD1/SDIN AD1/SDIN AD1/SDIN AD1/SDIN AD2/SSb AD2/SSb AD2/SSb AD2/SSb SERIAL SERIAL SERIAL SERIAL AUDIO AUDIO AUDIO AUDIO DSP ARITHMETIC ARITHMETIC ARITHMETIC ARITHMETIC UNIT UNIT UNIT UNIT INTERFACE INTERFACE INTERFACE INTERFACE SCL/SCK SCL/SCK SCL/SCK SCL/SCK SERIAL SERIAL SERIAL SERIAL BCKO O O O HOST... -
Page 3: Pin Configuration
NJU26207 Pin Configuration SDI3 SDI2 SDI1 VSSIO SDI0 VDDIO SDO0 VDDIO SDO1 BCKI SDO2 TEST TEST BCKO NJU26207 MUTEb VDDIO SSOP44 PROC SDA/SDOUT VSSIO SCL/SCK VDDIO AD2/SSb AD1/SDIN VDDPLL TEST VSSPLL TEST TEST RESETb CLKOUT VDDIO VSSIO Fig. 3 NJU26207 Pin Configuration Ver.2008-12-03 - 3 -... -
Page 4: Pin Description
NJU26207 Pin Description Table 1 Pin Description Pin No. Symbol Function Audio Data Input ch.3 (L/R) SDI3 Audio Data Input ch.2 (L/R) SDI2 Audio Data Input ch.1 (L/R) SDI1 Audio Data Input ch.0 (L/R) SDI0 LR Clock Input I/O Power Supply +3.3V VDDIO Bit Clock Input BCKI... -
Page 5: Audio Interface
NJU26207 Audio Interface The NJU26207 audio interface provides industry serial data formats of I S, MSB-first Left-justified or MSB-first Right-justified. The NJU26207 audio interface provides four data inputs, SDI0, SDI1, SDI2 and SDI3, and three data outputs, SDO0, SDO1 and SDO2 as shown in table 2 and 3. The input serial data is selected by the firmware command. - Page 6 NJU26207 C Bus When the NJU26207 is configured for I C bus communication in SEL=”Low”, the serial host interface transfers data on the SDA pin and clocks data on the SCL pin. The SDA is an open drain pin requiring a pull-up resistance. Pins AD1 and AD2 are used to configure the seven-bit SLAVE address of the serial host interface.
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Page 7: Pin Setting
NJU26207 Pin setting The NJU26207 operates default command setting after resetting the NJU26207. In addition, the NJU26207 restricts operation at power on by setting PROC pin and MUTEb pin. These pins are input pin. However, these pins operate as bi-directional pins. Connect with V or V through 3.3k resistance. - Page 8 NJU26207 Firmware Command Table Host processor can control the NJU26207 via I C bus or 4-Wire serial bus interface. The following table summarizes the available user commands. Table 9 Command Table Command Description Set Task Command System State Command Sample rate Select Command Smooth Control Config Command Master Volume Control Command Master Volume Balance Control Command...
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Page 9: License Information
NJU26207 License Information The Word “DOLBY”, “Dolby Volume” and the double D mark are trademarks of Dolby Laboratories. The NJU26207 can only be delivered to licensees of Dolby Laboratories. Please refer to the licensing application manual issued by Dolby Laboratories. [CAUTION] The specifications on this databook are only given for information , without any guarantee...