DS90UB929-Q1 Datasheet, PDF (17/71 Pages) Texas Instruments – 720p HDMI to FPD-Link III Bridge Serializer

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8 Detailed Description
DS90UB929-Q1
SNLS457 – NOVEMBER 2014
8.1 Overview
The DS90UB929-Q1 converts an HDMI interface (3 TMDS data channels + 1 TMDS Clock) to an FPD-Link III
interface. This device transmits a 35-bit symbol over a single serial pair operating up to 3.36Gbps line rate. The
serial stream contains an embedded clock, video control signals, RGB video data, and audio data. The payload
is DC-balanced to enhance signal quality and support AC coupling.
The DS90UB929-Q1 serializer is intended for use with a DS90UB926Q-Q1, DS90UB928Q-Q1, DS90UB940-Q1,
DS90UB948-Q1 deserializer.
The DS90UB929-Q1 serializer and companion deserializer incorporate an I2C compatible interface. The I2C
compatible interface allows programming of serializer or deserializer devices from a local host controller. In
addition, the devices incorporate a bidirectional control channel (BCC) that allows communication between
serializer/deserializer as well as remote I2C slave devices.
The bidirectional control channel (BCC) is implemented via embedded signaling in the high-speed forward
channel (serializer to deserializer) combined with lower speed signaling in the reverse channel (deserializer to
serializer). Through this interface, the BCC provides a mechanism to bridge I2C transactions across the serial
link from one I2C bus to another. The implementation allows for arbitration with other I2C compatible masters at
either side of the serial link.
8.2 Functional Block Diagram
Audio
PLL
Packet
FIFO
Audio
FIFO
TMDS
HPA
RX_5V
HDMI RX
PHY
Digital
TMDS
Interface
HDMI Controller
Digital
Video
I2S Audio
H FPD-Link
PAT D
III TX
GEN C Digital
P
FPD-Link III Digital
H
D ^FPD-Link
C
III TX
P
Digital
FPD3 TX
Analog
FPD-Link III
DDC
EDID/
Config
NVM
EDID Bridge Control
I/F
Digital
I2C
Optional
Secondary
I2S
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