DS90UB925Q Datasheet, PDF (19/41 Pages) Texas Instruments – 5 - 85 MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

DS90UB925Q
REPEATER APPLICATION
The DS90UB925Q and DS90UB926Q can be configured to extend data transmission over multiple links to multiple display devices.
Setting the devices into repeater mode provides a mechanism for transmitting to all receivers in the system.
Repeater Configuration
In the repeater application, in this document, the DS90UB925Q is referred to as the Transmitter or transmit port (TX), and the
DS90UB926Q is referred to as the Receiver (RX). Figure 12 shows the maximum configuration supported for Repeater imple-
mentations using the DS90UB925Q (TX) and DS90UB926Q (RX). Two levels of Repeaters are supported with a maximum of three
Transmitters per Receiver.
FIGURE 12. Maximum Repeater Application
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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 parallel LVCMOS interface fans out to up to three serializer devices, providing parallel RGB video data,
HS/VS/DE 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.
Figure 13 provides more detailed block diagram of a 1:2 repeater configuration.
Copyright © 1999-2012, Texas Instruments Incorporated
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