DS90UB927-Q1 Datasheet, PDF (21/56 Pages) Texas Instruments – 5MHz - 85MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

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I2S_WC
I2S_CLK
DS90UB927-Q1, DS90UB927Q, DS90UB927Q-Q1
SNLS416B – JUNE 2012
I2S
Transmitter
Bit Clock
Word Select
Data
4
DS90UH927Q
I2S_CLK
I2S_WC
I2S_Dx
Figure 17. I2S Connection Diagram
I2S_Dx
MSB
LSB MSB
LSB
Figure 18. I2S Frame Timing Diagram
When paired with a DS90UH926Q, the DS90UB927Q I2S interface supports a single I2S data input through
I2S_DA (24-bit video mode), or two I2S data inputs through I2S_DA and I2S_DB (18-bit video mode).
Table 3 covers several common I2S sample rates:
Sample Rate (kHz)
32
44.1
48
96
192
32
44.1
48
96
192
32
44.1
48
96
192
Table 3. Audio Interface Frequencies
I2S Data Word Size (bits)
16
16
16
16
16
24
24
24
24
24
32
32
32
32
32
I2S CLK (MHz)
1.024
1.411
1.536
3.072
6.144
1.536
2.117
2.304
4.608
9.216
2.048
2.822
3.072
6.144
12.288
I2S TRANSPORT MODES
By default, audio is packetized and transmitted during video blanking periods in dedicated Data Island Transport
frames. Data Island frames may be disabled from control registers if Forward Channel Frame Transport of I2S
data is desired. In this mode, only I2S_DA is transmitted to the DS90UB928Q deserializer. If connected to a
DS90UB926Q deserializer, I2S_DA and I2S_DB are transmitted. Surround Sound Mode, which transmits all four
I2S data inputs (I2S_D[A..D]), may only be operated in Data Island Transport mode. This mode is only available
when connected to a DS90UB928Q deserializer.
Copyright © 2012, Texas Instruments Incorporated
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