NJU26203A
Dolby Pro Logic II Decoder
General Description
The NJU26203A is a digital signal processor that provides the function of Dolby Pro Logic II,
Bass Management, Multi channel input, and 5-band PEQ function.
The applications of NJU26203A are suitable for multi channel products such as Car Audio,
DVD Receiver and speakers system.
■
Package
Features
-Software
Dolby Pro Logic II (Max 5.1ch Output)
Bass Management
Multi channel input
5-band PEQ
Center Mixer, Rear Center Mixer
Master Volume
-Hardware
24bit Fixed-point Digital Signal Processing
Maximum Clock Frequency
: 12.288MHz(Standard), built-in PLL Circuit
Digital Audio Interface
: 4 Input ports / 4 Output ports
Digital Audio Format
: I
2
S 24bit, left-justified, right-justified, BCK : 32fs/64fs
Master / Slave Mode
Microcomputer Interface
I
2
C Bus (Standard-mode/100kbps, Fast-mode/400kbps)
4-Wire Serial Bus (4-Wire: Clock, Enable, Input data, Output data)
Operating Voltage
: V
DD
= V
DDPLL
= 1.8V
: V
DDIO
= 3.3V
Input Terminal
: +5.0V Input tolerant
Package
: SSOP44 (Pb-Free)
NJU26203AV
* The detail hardware specification of the NJU26203A is described in the “ NJU26200 Series Hardware Data Sheet”.
Ver.2008-12-10
-1-
NJU26203A
Function Block Diagram
4 Stereo
L/R->LS/RS
SDI0
R
6 Stereo
L/R->C/SW
L/R->LS/RS
Center Delay
L
5 Band PEQ
SDO1
5 Band PEQ
SDI1
Input Trimmer
Bass Management
C
5 Band PEQ
SDO2
SDI2
SW
Master Volume & Channel Trim
5 Band PEQ
Pro Logic II
LS
SDI3
L/R
LFE Generator
SW
5 Band PEQ
LS/RS Delay
SDO3
RS
5 Band PEQ
LB
Delay
5 Band PEQ
SDO0
RB
Noise Generator
Smooth Control
*Center Mix is effective only at the time of 4ch Stereo Mode or Multi Input Mode choice.
*LFE Generator ON/OFF is effective only at the time of 4ch Stereo Mode choice.
Fig. 2 NJU26203A Function Block Diagram (Firmware)
4 Stereo
L/R->LS/RS
SDI0
L
5 Band PEQ
SDO1
R
5 Band PEQ
Center Delay
SDI1
Bass Management
C
Input Trimmer
L/R
5 Band PEQ
SDO2
SW
Master Volume & Channel Trim
5 Band PEQ
Pro Logic II
LS
5 Band PEQ
LS/RS Delay
SDO3
SW
LFE Generator
RS
5 Band PEQ
LB
Delay
5 Band PEQ
SDO0
RB
Noise Generator
Smooth Control
Fig. 3 NJU26203A Function Block Diagram (Stereo Input)
Ver.2008-12-10
-3-
NJU26203A
L
SDI0
R
L/R
SDI1
5 Band PEQ
5 Band PEQ
SDO1
Center Delay
Bass Management
C
Input Trimmer
C
5 Band PEQ
SDO2
SDI2
LFE Output Trim
SW
Master Volume & Channel Trim
C/SW
5 Band PEQ
LS
SDI3
5 Band PEQ
LS/RS Delay
LS/RS
SDO3
RS
5 Band PEQ
LB
Delay
5 Band PEQ
SDO0
RB
Noise Generator
Smooth Control
Fig. 4 NJU26203A Function Block Diagram (Multi channel input)
L
SDI0
R
6 Stereo
L/R->C/SW
L/R->LS/RS
5 Band PEQ
SDO1
5 Band PEQ
SDI1
Input Trimmer
Bass Management
LS/RS Delay
C
5 Band PEQ
SDO2
SW
Master Volume & Channel Trim
5 Band PEQ
LS
5 Band PEQ
SDO3
RS
5 Band PEQ
LB
Delay
5 Band PEQ
SDO0
RB
Noise Generator
Smooth Control
Fig. 5 NJU26203A Function Block Diagram (Stereo Input, NON-FADER (6ch Stereo))
-4-
Ver.2008-12-10
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