JRC NJU26209, Руководство пользователя

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NJU26209
- 6 -
Ver.2008-12-04
Audio Interface
The NJU26209 audio interface provides industry serial data formats of I
2
S, MSB-first Left-justified or MSB-first
Right-justified. The NJU26209 audio interface provides four data inputs, SDI0, SDI1, SDI2 and SDI3, and four data
outputs, SDO0, SDO1, SDO2 and SDO3 as shown in table 2 and 3. The input serial data is selected by the firmware
command.
Table 2 Serial Audio Input Pin
Description
Pin No. Symbol
Stereo input Multi channel input
4 SDI0
3 SDI1 Audio Data Input (L/R)
(SDI0/SDI1 pin select) Audio Data Input (L/R)
(SDI0/SDI1 pin select)
2 SDI2 None Audio Data Input 2 (C/SW)
1 SDI3 None Audio Data Input 3 (LS/RS)
Table 3 Serial Audio Output Pin
Pin No. Symbol Description
40 SDO0 Audio Data Output 0 (LS/RS)
39 SDO1 Audio Data Output 1 (L/R)
38 SDO2 Audio Data Output 2 (C/SW)
37 SDO3 Audio Data Output 3 (LM/RM)
Host Interface
The NJU26209 can be controlled via Serial Host Interface (SHI) using either of two serial bus formats : I
2
C 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 I
2
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 Setting Host Interface
Low I
2
C Bus Interface
16 SEL
High 4-Wire Serial Interface
Table 5 Serial Host Interface Pin Description
Pin No.
Symbol
(I
2
C /Serial)
I
2
C bus Interface 4-Wire Serial Interface
29 AD1/SDIN I
2
C Address Select Bit1 Serial data input
30 AD2/SSb I
2
C Address Select Bit2 Slave select
31 SCL/SCK Serial Clock Serial Clock
32 SDA/SDOUT
Serial Data Input/Output
(Open Drain output)
Serial data output
(CMOS Output)
Note:
When I
2
C Bus is selected, this pin is a bi-directional Open Drain output. This pin, which is assigned for I
2
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.