DS90UB921-Q1 Datasheet, PDF (26/57 Pages) Texas Instruments – 5 - 96 MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

DS90UB921-Q1
SNLS488 – MARCH 2016
Device Functional Modes (continued)
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upstream
Transmitter
I2C
I2C
Master
DS90UB926-Q1
Receiver
Parallel
LVCMOS
I2S Audio
DS90UB921-Q1
Transmitter
I2C
Slave
DS90UB921-Q1
Transmitter
I2C
Slave
downstream
Receiver
or
Repeater
downstream
Receiver
or
Repeater
FPD-Link III interfaces
Figure 20. 1:2 Repeater Configuration
7.4.2.2 Repeater Connections
The Repeater requires the following connections between the Receiver and each Transmitter Figure 21.
1. Video Data – Connect PCLK, RGB and control signals (DE, VS, HS).
2. I2C – Connect SCL and SDA signals. Both signals should be pulled up to VDD33 with 4.7 kΩ resistors.
3. Audio – Connect I2S_CLK, I2S_WC, and I2S_DA signals.
4. IDx pin – Each Transmitter and Receiver must have an unique I2C address.
5. MODE_SEL pin – All Transmitter and Receiver must be set into the Repeater Mode.
6. Interrupt pin – Connect DS90UB926Q-Q1 INTB_IN pin to DS90UB921-Q1 INTB pin. The signal must be
pulled up to VDDIO.
DS90UB926-Q1
DS90UB921-Q1
RGB[7:0) / ROUT[23:0]
DIN[23:0] / RGB[7:0]
DE
VS
HS
VDD33
MODE_SEL
I2S_CLK
I2S_WC
I2S_DA
VDD33
ID[x]
INTB_IN
SDA
SCL
Optional
VDDIO
Optional
VDD33
DE
VS
HS
I2S_CLK
I2S_WC
I2S_DA
MODE_SEL
VDD33
INTB
SDA
SCL
VDD33
ID[x]
Figure 21. Repeater Connection Diagram
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