DS90UB921-Q1 Datasheet, PDF (40/57 Pages) Texas Instruments – 5 - 96 MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

DS90UB921-Q1
SNLS488 – MARCH 2016
8 Application and Implementation
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NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The DS90UB921-Q1, in conjunction with the DS90UB948-Q1, is intended for interface between a host (graphics
processor) and a Display. It supports a 24-bit color depth (RGB888) and extended high definition (1920x720p)
digital video format. It can receive a three 8-bit RGB stream with a pixel rate up to 96 MHz together with three
control bits (VS, HS and DE) and three I2S-bus audio stream with an audio sampling rate up to 192 kHz.
8.2 AVMUTE Operation
When using DS90UB921-Q1, it is possible to send video data during the blanking period (DE = L). If a specific
pattern is sent during the blanking period, the paired Deserializer will enter AVMUTE mode. The pattern that the
Deserializer is looking for is 24'h666666. If the last pixel of the frame is 24'h666666, and the video transmission
extends into the DE = L, period, then AVMUTE mode will be enabled.
Setting 0x04[1] = "1" on the DS90UB921-Q1 will prevent video from being sent during the blanking interval. This
will ensure AVMUTE mode is not entered during normal operation.
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