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PDF NJU26207 Data sheet ( Hoja de datos )
| Número de pieza | NJU26207 | |
| Descripción | Dolby Volume Decoder | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU26207www.DataSheet4U.com
Dolby Volume Decoder
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.
■Package
Features
-Software
Dolby Volume (512FFT Window / 20Band)
Delay
Master Volume / Balance Control
Sampling Frequency : 32kHz, 44.1kHz, 48kHz
2 Input channels, 2 Output channels
NJU26207V
-Hardware
24bit Fixed-point Digital Signal Processing
Maximum Clock Frequency : 12.288MHz(Standard), built-in PLL Circuit
Digital Audio Interface
: 4 Input ports / 3 Output ports
Digital Audio Format
: I2S 24bit, left-justified, right-justified, BCK : 32fs/64fs
Master / Slave Mode
Microcomputer Interface
I2C Bus (Standard-mode/100kbps, Fast-mode/400kbps)
4-Wire Serial Bus (4-Wire: Clock, Enable, Input data, Output data)
Operating Voltage
Input Terminal
: VDD = VDDPLL = 1.8V
: VDDIO = 3.3V
: +5.0V Input tolerant
Package
: SSOP44 (Pb-Free)
* The detail hardware specification of the NJU26207 is described in the “ NJU26200 Series Hardware Data Sheet”.
Ver.2008-12-03
-1-
1 page  
NJU26207www.DataSheet4U.com
Audio Interface
The NJU26207 audio interface provides industry serial data formats of I2S, 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.
Table 2 Serial Audio Input Pin
Pin No. Symbol
Description
4 SDI0 Audio Data Input 0 (L/R)
3 SDI1 Audio Data Input 1 (L/R)
2 SDI2 Audio Data Input 2 (L/R)
1 SDI3 Audio Data Input 3 (L/R)
Table 3 Serial Audio Output Pin
Pin No. Symbol
Description
40 SDO0 Audio Data Output 0 (L/R)
39 SDO1 Audio Data Output 1 ((L/R)/2)
38 SDO2 Audio Data Output 2 (Monitor L/R)
Host Interface
The NJU26207 can be controlled via Serial Host Interface (SHI) using either of two serial bus formats : I2C bus or
4-Wire serial bus. Data transfers are in 8 bits packets (1 byte) when using either format. The SHI operates only in a
SLAVE fashion. A host controller connected to the interface always drives the clock (SCL / SCK) line and initiates data
transfers, regardless of the chosen communication protocol.
The detail I2C bus and 4-Wire Serial bus information are described in the ‘NJU26200 Series Hardware Data
Sheet’.
Table 4 Serial Host Interface Pin Descriptions
Pin No. Symbol
Setting
16 SEL
Low
High
Host Interface
I2C Bus Interface
4-Wire Serial Interface
Table 5
Pin No.
29
30
31
32
Serial Host Interface Pin Description
Symbol
(I2C /Serial)
AD1/SDIN
AD2/SSb
I2C bus Interface
I2C Address Select Bit1
I2C Address Select Bit2
SCL/SCK
Serial Clock
SDA/SDOUT
Serial Data Input/Output
(Open Drain output)
4-Wire Serial Interface
Serial data input
Slave select
Serial Clock
Serial data output
(CMOS Output)
Note: When I2C Bus is selected, the SDA/SDOUT pin is a bi-directional Open Drain output. This pin, which is assigned
for I2C Bus, requires a pull-up resistance.
When 4-Wire Serial bus is selected, the SDA/SDOUT pin is CMOS output.
The SDA/SDOUT pin isn’t 5.0V Input tolerant.
Ver.2008-12-03
-5-
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJU26207.PDF ] | |
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