DS90UH927Q-Q1 Datasheet, PDF (29/68 Pages) Texas Instruments – 5-MHz to 85-MHz 24-Bit Color FPD-Link III Serializer with HDCP

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DS90UH927Q-Q1
SNLS433C – NOVEMBER 2012 – REVISED JANUARY 2015
Device Functional Modes (continued)
7.4.5.4 Repeater Connections
The HDCP Repeater requires the following connections between the HDCP Receiver and each HDCP
Transmitter Figure 23.
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 HDCP Transmitter and Receiver must have a unique I²C address.
5. REPEAT pin — All HDCP Transmitters and Receivers must be set into Repeater Mode.
6. Interrupt pin – Connect DS90UH928Q-Q1 INTB_IN pin to DS90UH927Q-Q1 INTB pin. The signal must be
pulled up to V_DDIO.
DS90UH928Q-Q1
DS90UH927Q-Q1
VDD33
TxOUT0+
TxOUT0-
TxOUT1+
TxOUT1-
TxOUT2+
TxOUT2-
TxOUT3+
TxOUT3-
TxCLK+
TxCLK-
RxIN0+
RxIN0-
RxIN1+
RxIN1-
RxIN2+
RxIN2-
RxIN3+
RxIN3-
RxCLK+
RxCLK-
VDD33
MODE_SEL
I2S_CLK
I2S_WC
I2S_Dx
VDD33
Optional
VDDIO
I2S_CLK
I2S_WC
I2S_Dx
REPEAT
VDD33
IDx
INTB_IN
IDx
INTB
VDD33
SDA
SDA
SCL
SCL
Figure 23. HDCP Repeater Connection Diagram
7.4.5.4.1 Repeater Fan-Out Electrical Requirements
Repeater applications requiring fan-out from one DS90UH928Q-Q1 deserializer to up to three DS90UH927Q-Q1
serializers requires special considerations for routing and termination of the FPD-Link differential traces.
Figure 24 details the requirements that must be met for each signal pair:
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