DS90UB924-Q1 Datasheet, PDF (16/62 Pages) Texas Instruments – 5-MHz to 96-MHz 24-bit Color FPD-Link III to OpenLDI Deserializer With Bidirectional Control Channel

DS90UB924-Q1
SNLS512 – APRIL 2016
7 Detailed Description
www.ti.com
7.1 Overview
The DS90UB924-Q1 receives a 35-bit symbol over a single serial FPD-Link III pair operating at up to 3.36 Gbps
line rate and converts this stream into an FPD-Link (OpenLDI) Interface (4 LVDS data channels + 1 LVDS
Clock). The FPD-Link III serial stream contains an embedded clock, video control signals, and the DC-balanced
video data and audio data which enhance signal quality to support AC coupling.
The DS90UB924-Q1 deserializer attains lock to a data stream without the use of a separate reference clock
source, which greatly simplifies system complexity and overall cost. The deserializer also synchronizes to the
serializer regardless of the data pattern, delivering true automatic plug and lock performance. It can lock to the
incoming serial stream without the need of special training patterns or sync characters. The deserializer recovers
the clock and data by extracting the embedded clock information, validating then deserializing the incoming data
stream.
The DS90UB924-Q1 deserializer incorporates an I²C-compatible interface. The I²C-compatible interface allows
programming of serializer or deserializer devices from a local host controller. In addition, the
serializer/deserializer 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.
The DS90UB924-Q1 deserializer is intended for use with DS90UB921-Q1, DS90UB925Q-Q1, or DS90UB927Q-
Q1 serializers, but is also backward compatible with DS90UR905Q and DS90UR907Q FPD-Link III serializers.
7.2 Functional Block Diagram
CMF
RIN+
RIN-
BISTEN
BISTC
LFMODE
MAPSEL
PDB
SCL
SCA
IDx
MODE_SEL
REGULATOR
Timing and
Control
Error
Detector
Clock and
Data
Recovery
OEN
OSS_SEL
TxOUT3±
TxOUT2±
TxOUT1±
TxOUT0±
TxCLKOUT±
8
I2S / GPIO
PASS
LOCK
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Copyright © 2016, Texas Instruments Incorporated