Audio Interface; Host Interface - JRC DOLBY NJU26207 Quick Start Manual

Audio Interface

The NJU26207 audio interface provides industry serial data formats of I
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
4 SDI0
3 SDI1
2 SDI2
1 SDI3
Table 3 Serial Audio Output Pin
Pin No. Symbol
40 SDO0
39 SDO1
38 SDO2

Host Interface

The NJU26207 can be controlled via Serial Host Interface (SHI) using either of two serial bus formats : I
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.
2
The detail I C 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
16 SEL
Table 5 Serial Host Interface Pin Description
Symbol
Pin No.
2
(I C /Serial)
29 AD1/SDIN
30 AD2/SSb
31 SCL/SCK
32 SDA/SDOUT
2
Note: When I C Bus is selected, the SDA/SDOUT pin is a bi-directional Open Drain output. This pin, which is assigned
2
for I C 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
Description
Audio Data Input 0 (L/R)
Audio Data Input 1 (L/R)
Audio Data Input 2 (L/R)
Audio Data Input 3 (L/R)
Description
Audio Data Output 0 (L/R)
Audio Data Output 1 ((L/R)/2)
Audio Data Output 2 (Monitor L/R)
Setting
Low
High
2
I C bus Interface
2
I C Address Select Bit1
2
I C Address Select Bit2
Serial Clock
Serial Data Input/Output
(Open Drain output)
2
S, MSB-first Left-justified or MSB-first
Host Interface
2
I C Bus Interface
4-Wire Serial Interface
4-Wire Serial Interface
Serial data input
Slave select
Serial Clock
Serial data output
(CMOS Output)
NJU26207
2
C bus or
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