NJU26123V NJRC [New Japan Radio], NJU26123V Datasheet - Page 11

• Manufacturer Part Number: NJU26123V
• Description: Digital Signal Processor for TV
• Manufacturer: NJRC [New Japan Radio]

3. Digital Audio Interface
Ver.2008-04-17
3.1 Digital Audio Data Format
3.2 Serial Audio Data Input/output
Table 8 Serial Audio Input Pin Description
Table 9 Serial Audio Output Pin Description
(1) I
(2) Left-justified : LR clock -- MSB is placed for changing.
(3) Right-justified : LSB is placed just before LR clock change rate.
The NJU26123 can use three kinds of formats hereafter as industry-standard digital audio data format.
The main differences among three kinds of formats are in the position relation between LR clock (LR) and
an audio data (SDI, SDO).
The NJU26123 audio interface includes 3 data input lines: SDI0, SDI1 and SDI2 (Table 8). 3 data output
lines: SDO0, SDO1 and SDO2. (Table 9).
- In every format:
- In Right/Left-justified : LR clock ='High' shows a left channel.
- I
- The Bit clock BCK is used as a shift clock of transmission data. The number of clocks more than
- One cycle of LR clock is one sample of a stereo audio data. The frequency of LR clock becomes
-
Pin No.
Pin No.
2
the number of sum total transmission bits of a L/R channel is needed at least.
equal to a sample rate (Fs).
S
19
20
21
2
6
5
4
The NJU26123 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.
S
Symbol
Symbol
SDO0
SDO1
SDO2
SDI0
SDI1
SDI2
: MSB is put on the 2nd bit of LR clock change rate.(1 bit is delayed to left stuffing)
: a left channel is transmitted previously.
: LR clock=”Low” shows a left channel.
Audio Data Input 0 L/R
Audio Data Input 1 L/R
Audio Data Input 2 L/R
Audio Data Output 0 L/R
Audio Data Output 1 L/R
Audio Data Output 2 L/R
Description
Description
NJU26123
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