DS90UB927-Q1 Datasheet, PDF (23/56 Pages) Texas Instruments – 5MHz - 85MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

DS90UB927-Q1, DS90UB927Q, DS90UB927Q-Q1
www.ti.com
SNLS416B – JUNE 2012
In a repeater application, the I2C interface at each TX and RX may be configured to transparently pass I2C
communications upstream or downstream to any I2C device within the system. This includes a mechanism for
assigning alternate IDs (Slave Aliases) to downstream devices in the case of duplicate addresses.
At each repeater node, the FPD-Link interface fans out to up to three serializer devices, providing video, audio,
and control signals and, optionally, packetized audio data (transported during video blanking intervals).
Alternatively, the I2S audio interface may be used to transport digital audio data between receiver and
transmitters in place of packetized audio. All audio and video data is transmitted at the output of the receiver and
is received by the transmitter.
If video data is output to a local display, White Balancing and Hi-FRC dithering functions should not be used as
they will block encrypted I2S audio.
upstream
Transmitter
I2C
I2C
Master
HDCP Receiver
(RX)
FPD-Link
I2S Audio
HDCP Transmitter
TX
I2C
Slave
HDCP Transmitter
TX
I2C
Slave
downstream
Receiver
or
Repeater
downstream
Receiver
or
Repeater
FPD-Link III interfaces
Figure 20. 1:2 Repeater Configuration
REPEATER CONNECTIONS
The Repeater requires the following connections between the Receiver and Transmitter Figure 21.
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 = 3.0V to 3.6V 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 pin — All Transmitters and Receivers must be set into Repeater Mode.
6. Interrupt pin – Connect DS90UB928Q INTB_IN pin to DS90UB927Q INTB pin. The signal must be pulled up
to V_DDIO.
Copyright © 2012, Texas Instruments Incorporated
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Product Folder Links: DS90UB927-Q1 DS90UB927Q DS90UB927Q-Q1