DS90UH926QSQE Datasheet, PDF (23/56 Pages) Texas Instruments – DS90UH926Q 720p 24-bit Color FPD-Link III Deserializer with HDCP

DS90UH926Q
www.ti.com
SNLS337J – OCTOBER 2010 – REVISED APRIL 2013
HDCP
The Cipher function is implemented in the deserializer per HDCP v1.3 specification. It supports the HDCP key
exchange for the authentication over the back channel with the DS90UH925Q serializer. An on-chip Non-Volatile
Memory (NVM) is used to store the HDCP keys. The confidential HDCP keys are loaded by TI during the
manufacturing process and are not accessible external to the device.
The DS90UH926Q receives encrypted data and uses the Cipher engine to decrypt as per HDCP v1.3. Decrypted
data is available at the deserializer parallel output interface.
HDCP REPEATER
When DS90UH925Q and DS90UH926Q are configured as the HDCP Repeater application, it provides a
mechanism to extend HDCP transmission over multiple links to multiple display devices. This repeater
application provides a mechanism to authenticate all HDCP Receivers in the system and distribute protected
content to the HDCP Receivers using the encryption mechanisms provided in the HDCP specification.
Repeater Configuration
In HDCP repeater application, In this document, the DS90UH925Q is referred to as the HDCP Transmitter or
transmit port (TX), and the DS90UH926Q is referred to as the HDCP Receiver (RX). Figure 15 shows the
maximum configuration supported for HDCP Repeater implementations using the DS90UH925Q (TX) and
DS90UH926Q (RX). Two levels of HDCP Repeaters are supported with a maximum of three HDCP Transmitters
per HDCP Receiver.
Source
TX
1:3 Repeater
TX
RX
TX
1:3 Repeater
TX
RX
TX
RX
Display
RX
Display
TX
RX
Display
TX
1:3 Repeater
TX
RX
TX
RX
Display
RX
Display
TX
1:3 Repeater
TX
RX
TX
RX
Display
RX
Display
RX
Display
TX
RX
Display
Figure 15. HDCP Maximum Repeater Application
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