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PDF NJU26125 Data sheet ( Hoja de datos )
| Número de pieza | NJU26125 | |
| Descripción | Seat Positioning Surround Decoder | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU26125www.DataSheet4U.com
Seat Positioning Surround Decoder
■ General Description
■Package
The NJU26125 is a high performance 24-bit digital signal processor.
The NJU26125 provides NJRC Original Car Surround technology.
These kinds of sound functions are suitable for Car Audio that has four channel
output speakers.
■ FEATURES
- Software
•Seat Positioning Surround
Car Surround
Elevation
Bass Enhance
• Input Trimmer
• 7 Band PEQ: PEQ, LPF, HPF, LSF, HSF
• Filter: HPF(SDO0/SDO1), LPF(SDO2)
• Simulated Stereo
• Master Volume & Channel Trimmer
• Navigation Voice Mix Trimmer
NJU26125VC2
- Hardware
• 24bit Fixed-point Digital Signal Processing
• Maximum System Clock Frequency : 12.288MHz Max. built-in PLL Circuit
• Digital Audio Interface
: 3 Input ports / 3 Output ports
• Digital Audio Format
: I2S 24bit, Left- justified, Right-justified, BCK : 32/64fs
• Master / Slave Mode
- Master Mode, MCK : 384fs @32kHz, 256fs @48kHz
• Host Interface
: I2C bus (Fast-mode/400kbps)
• Power Supply
: 3.3V
• Input terminal
: 5V Input tolerant
• Package
: SSOP24-C2 (Pb-Free)
Ver.2010-07-01
-1-
1 page  
NJU26125www.DataSheet4U.com
■ Absolute Maximum Ratings
Table 2 Absolute Maximum Ratings
Parameter
Symbol
( VSS=0V=GND, Ta=25°C )
Rating
Units
Supply Voltage *
Supply Voltage Bypass *
In
I/O, OD
Pin Voltage *
Out
CLK
VDD
VREGO
Vx(IN)
Vx(I/O) ,Vx(OD)
Vx(OUT)
Vx(CLK)
-0.3 to 4.2
-0.3 to 2.3
-0.3 to 5.5 (VDD≥ 3.0V)
-0.3 to 4.2 (VDD< 3.0V)
-0.3 to 4.2
V
V
V
CLKOUT Vx(CLKOUT)
Power Dissipation
Operating Voltage
Storage Temperature
PD
TOPR
TSTR
565
-40 to 85
-40 to 125
mW
°C
°C
* The LSI must be used inside of the “Absolute maximum ratings”. Otherwise, a stress may cause permanent
damage to the LSI.
* VDD
* VREGO
* Vx(IN)
* Vx(OD)
* Vx(I/O)
* Vx(OUT)
* Vx(CLK)
* Vx(CLKOUT)
: 8 pin
: 12 pin
: 1, 4, 5, 6, 10, 15, 23, 24 pin
: 22 pin
: 2, 3, 7, 16, 17, 18 pin
: 19, 20, 21 pin
: 14 pin
: 13 pin
■ Terminal equivalent circuit diagram
VDD
VDD(1.8V)
CLK
CLKOUT
VDD
VDD(1.8V)
PAD
RPD
Input, I/O (Input part) VSS
(1 to 7, 22, 23pin)
(with RPU : 18pin , With RPD: 15, 16, 17, 24pin)
VDD
RPU
PAD
CLK/CLKOUT
(13, 14pin)
VSS
VDD
PAD
Output Disable
VSS
Output, I/O (Output part)
(2, 3, 7, 16, 17, 19, 20, 21pin )
( Open Drain Output with RPU: 18pin)
( Open Drain Output: 22pin )
STBYb
(10pin)
VSS
Fig.4 NJU26125 Terminal equivalent circuit diagram
Ver.2010-07-01
-5-
5 Page 
NJU26125www.DataSheet4U.com
3. Digital Audio Interface
3.1 Digital Audio Data Format
The NJU26125 can use three kinds of formats hereafter as industry-standard digital audio data format.
(1) I2S
: MSB is put on the 2nd bit of LR clock change rate.(1 bit is delayed to left stuffing)
(2) Left-justified : LR clock -- MSB is placed for changing.
(3) Right-justified : LSB is placed just before LR clock change rate.
The main differences among three kinds of formats are in the position relation between LR clock (LR) and
an audio data (SDI, SDO).
- In every format:
: a left channel is transmitted previously.
- In Right/Left-justified : LR clock ='High' shows a left channel.
- I2S : LR clock=”Low” shows a left channel.
- The Bit clock BCK is used as a shift clock of transmission data. The number of clocks more than
the number of sum total transmission bits of a L/R channel is needed at least.
- One cycle of LR clock is one sample of a stereo audio data. The frequency of LR clock becomes
equal to a sample rate (Fs).
- The NJU26125 supports serial data format which includes 32(32fs) or 64(64fs) BCK clocks. This
serial data format is applied to both MASTER and SLAVE mode.
3.2 Serial Audio Data Input/output
The NJU26125 audio interface includes 3 data input lines: SDI0, SDI1 and SDI2 (Table 8). 3 data output
lines: SDO0, SDO1 and SDO2. (Table 9).
Table 8 Serial Audio Input Pin Description
Pin No. Symbol
Description
6 SDI0 Audio Data Input 0 L/R
5 SDI1 Audio Data Input 1 L/R
4 SDI2 Audio Data Input 2 Navigation Voice
Table 9 Serial Audio Output Pin Description
Pin No. Symbol
Description
19 SDO0 Audio Data Output 0 Front L/R
20 SDO1 Audio Data Output 1 Rear L/R
21 SDO2 Audio Data Output 2 Subwoofer L/R
Please refer “Fig.2 NJU26125 Function Diagram”.
Ver.2010-07-01
- 11 -
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet NJU26125.PDF ] | |
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