DS90UB928Q-Q1 Datasheet, PDF (35/69 Pages) Texas Instruments – 5 MHz to 85 MHz 24-bit Color FPD-Link III to FPD-Link Deserializer With Bidirectional Control Channel

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DS90UB928Q-Q1
SNLS417C – MARCH 2013 – REVISED JULY 2016
8.4.5.1 Repeater Connections
The Repeater requires the following connections between the Receiver and each Transmitter Figure 35.
1. Video Data – Connect all FPD-Link data and clock pairs
2. I²C – Connect SCL and SDA signals. Both signals should be pulled up to V_DD33 or V_DDIO = 3.0 V to 3.6 V with
4.7 kΩ resistors.
3. Audio (optional) – Connect I2S_CLK, I2S_WC, and I2S_Dx signals.
4. IDx pin – Each Transmitter and Receiver must have an unique I²C address.
5. REPEAT & MODE_SEL pins — All Transmitters and Receivers must be set into Repeater Mode.
6. Interrupt pin – Connect DS90UB928Q-Q1 INTB_IN pin to the DS90UB927Q-Q1 INTB pin. The signal must
be pulled up to V_DDIO with a 10 kΩ resistor.
VDD33
Deserializer
TxOUT0+
TxOUT0-
TxOUT1+
TxOUT1-
TxOUT2+
TxOUT2-
TxOUT3+
TxOUT3-
TxCLKOUT+
TxCLKOUT-
Serializer
RxIN0+
RxIN0-
RxIN1+
RxIN1-
RxIN2+
RxIN2-
RxIN3+
RxIN3-
RxCLKIN+
RxCLKIN-
VDD33
MODE_SEL
I2S_CLK
I2S_WC
I2S_Dx
VDD33
Optional
VDDIO
I2S_CLK
I2S_WC
I2S_Dx
REPEAT
VDD33
IDx
INTB_IN
INTB
IDx
VDD33
SDA
SCL
SDA
SCL
Copyright © 2016, Texas Instruments Incorporated
Figure 33. Repeater Connection Diagram
8.4.5.1.1 Repeater Fan-Out Electrical Requirements
Repeater applications requiring fan-out from one DS90UB928Q-Q1 deserializer to up to three DS90UB927Q-Q1
serializers requires special considerations for routing and termination of the FPD-Link differential traces.
Figure 36 details the requirements that must be met for each signal pair:
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