DS90UH929-Q1 Datasheet, PDF (19/77 Pages) Texas Instruments – 720p HDMI to FPD-Link III Bridge Serializer with HDCP

www.ti.com
DS90UH929-Q1
SNLS458 – NOVEMBER 2014
Feature Description (continued)
8.3.4.4 Internal Pre-Programmed EDID
The serializer also has an internal eFuse that is loaded into the internal SRAM with pre-programmed 256-byte
EDID data at startup. This EDID profile supports several generic video (480p, 720p) and audio (2-channel audio)
timing profiles within the single-link operating range of the device (25MHz-96MHz pixel clock). In this mode, the
internal EDID SRAM data is readable from the DDC interface. The EDID contents are below:
0x00 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0x00 0x53 0x0E 0x49 0x09 0x01 0x00 0x00 0x00
0x1C 0x18 0x01 0x03 0x80 0x34 0x20 0x78 0x0A 0xEC 0x18 0xA3 0x54 0x46 0x98 0x25
0x0F 0x48 0x4C 0x00 0x00 0x00 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01
0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x1D 0x00 0x72 0x51 0xD0 0x1E 0x20 0x6E 0x50
0x55 0x00 0x00 0x20 0x21 0x00 0x00 0x18 0x00 0x00 0x00 0xFD 0x00 0x3B 0x3D 0x62
0x64 0x08 0x00 0x0A 0x20 0x20 0x20 0x20 0x20 0x20 0x00 0x00 0x00 0xFC 0x00 0x54
0x49 0x2D 0x44 0x53 0x39 0x30 0x55 0x78 0x39 0x34 0x39 0x0A 0x00 0x00 0x00 0x10
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x57
0x02 0x03 0x15 0x40 0x41 0x84 0x23 0x09 0x7F 0x05 0x83 0x01 0x00 0x00 0x66 0x03
0x0C 0x00 0x10 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x28
8.3.5 Consumer Electronics Control (CEC)
Consumer Electronics Control (CEC) is designed to allow the system user to command and control up-to ten
CEC-enabled devices connected through HDMI, using only one of their remote controls (for example by
controlling a television set, set-top box, and DVD player using only the remote control of the TV). CEC also
allows for individual CEC-enabled devices to command and control each other without user intervention. CEC is
a one-wire open drain bus with an external 27kohm (+/-10%) resistor pull-up to 3.3V.
CEC protocol can be implemented using an external clock reference or the 25MHz internal oscillator inside the
DS90UH929-Q1.
8.3.6 +5V Power Signal
+5V is asserted by the HDMI source through the HDMI interface. The +5V signal propagates through the
connector and cable until it reaches the sink. The +5V supply is used for various HDMI functions, such as HPD
and DDC signals.
8.3.7 Hot Plug Detect (HPD)
The HPD pin is asserted by the sink to let the source know that it is ready to receive the HDMI signal. The
source initiates the connection by first providing the +5V power signal through the HDMI interface. The sink holds
HPD low until it is ready to receive signals from the source, at which point it will release HPD to be pulled up to
+5V.
8.3.8 High Speed Forward Channel Data Transfer
The High Speed Forward Channel is composed of 35 bits of data containing RGB data, sync signals, HDCP,
I2C, GPIOs, and I2S audio transmitted from serializer to deserializer. Figure 10 illustrates the serial stream per
clock cycle. This data payload is optimized for signal transmission over an AC coupled link. Data is randomized,
balanced and scrambled.
C1
C0
Figure 10. FPD-Link III Serial Stream
Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: DS90UH929-Q1
Submit Documentation Feedback
19