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PDF NJU26060-03A Data sheet ( Hoja de datos )

Número de pieza NJU26060-03A
Descripción Digital Signal Processor
Fabricantes New Japan Radio 
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NJU26060-03A
Digital Signal Processor with PWM Modulator
! General Description
! Package
The NJU26060-03A is a high performance 24-bit digital signal processor
included sampling rate converter (SRC), PWM modulators. The
NJU26060-03A provides SRS TruVolume, SRS WOW HD. The
NJU26060-03A can be realize natural dynamic range compression (by
TruVolume), and the feeling of being there (by WOW HD).
The NJU26060-03A is suitable for stereo audio system such as active
speaker systems, mini-components, and TVs.
! Features
NJU26060-03A
- Hardware
24bit Fixed-point Digital Signal Processing
Clock Frequency
: 24.576MHz, Embedded PLL Circuit
Sampling rate converter (SRC) : Fs=8kHz to 192kHz 48kHz
PWM modulator
: 4ch Outputs (2 stereos)
Digital interface transmitter (DIT) : 1 port
Digital Audio Interface : 3 Input ports / 2 Output ports (switch over from PWM output)
Digital Audio Format
: I2S 24bit, Left-justified, Right-justified, BCK : 32/64fs
Master / Slave Mode
- Sampling Rate Converter: Slave mode
- DSP: Master Mode
Host Interface
- I2C Bus ( Fast-mode/400kbps)
Power Supply
: VDD = 3.3V
Input terminal:
: 5V Input tolerant
Package
: SSOP44 (Pb-Free)
- Software
SRS TruVolume
SRS WOW HD
Master volume
Watch dog clock output
* The detail hardware specification of the NJU26060-03A is described in the “NJU26060 Series Hardware
Specification”.
Ver.2011-11-11
-1-

1 page




NJU26060-03A pdf
NJU26060-03A
! Audio Clock
Three kinds of clocks are needed for digital audio data transfer.
(1) LR clock (LRI, LRO) is needed by serial-data transmission. It is the same as the sampling
frequency of a digital audio signal.
(2) Bit clock (BCKI, BCKO) is needed by serial-data transmission. It becomes the multiple of LR clock.
(3) Master clock (MCKO) needed by A/D, D/A converter, etc. It becomes the multiple of LR clock. It is
not related to serial audio data transmission.
The NJU26060-03A support serial data format that includes 32(32fs) or 64(64fs) BCK clocks.
The NJU26060-03A supplies the clock necessary for digital audio data transmission to an external
device as a master device by each terminal of MCKO, BCKO, and LRO. On the other hand, the sampling
rate converter that works as a slave device takes digital audio data with the clock input to BCKI and the
terminal LRI, and converts the sampling frequency into the clock system composed of
MCKO/BCKO/LRO. After internal reset ends as a master clock, the terminal MCKO sets the buffer
output or 2 dividing frequency the output of the input clock to the terminal CLK. The stop is also possible
according to the command of the firmware.
The NJU26060-03A is used by 512 times the internal operation sampling frequency (It is 24.576MHz
in the sampling frequency 48kHz). In that case, NJU26060-03A can output 64 times, 32 times the bit
clock to of the LR clock one time the sampling frequency and of each, and 512 times and 256 times the
master clock as a mastering device. Table 5 shows the relation of each clock.
The NJU26060 series support two clock frequencies (24.576kHz ,or 22.572kHz) as hardware
specifications. However NJU26060-03A acceptable one clock frequency (24.576kHz), cause of the
software on NJU26060-03A supports one clock frequency (24.576kHz).
Table 2. Supply Clock for CLK pin Frequency and BCKO,LRO,MCKO
Clock Signal
Multiple Frequency
Clock Frequency
24.576MHz(for pin#35)
LRO
1Fs
48kHz
BCKO(32Fs)
32Fs
1.536MHz
BCKO(64Fs)*
64Fs
3.072MHz
MCKO(256Fs)*
256Fs
12.288MHz
MCKO(512Fs)
512Fs
24.576MHz
* default for starting up
! Serial Audio Data Input/Output
Audio interface of the NJU26060-03A includes three data input ports: SDI0, SDI1 and SDI2 (Table 3),
and three data output ports: SDO0, SDO1 and SDO2 (Table 4).
Table 3.
Pin No.
8
9
10
Serial Audio Input Pin Description
Symbol
Description
SDI0
Audio Data Input 0
SDI1
Audio Data Input 1
SDI2
Audio Data Input 2
Table 4. Serial Audio Output Pin Description
Pin No. Symbol
Description
20 OUTLN1 Audio Data Output 0 (L/R)
18 OUTRN1 Audio Data Output 1 (SW/SW)
41 SDO
OFF
Pin#20, 18 can be change the function to PWM1 output. Pin#41 can be change the function to DIT
Ver.2011-11-11
-5-

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