TDA19989 NXP Semiconductors, TDA19989 Datasheet - Page 28

• Manufacturer Part Number: TDA19989
• Description: 150 MHz pixel rate HDMI 1.3 transmitter
• Manufacturer: NXP Semiconductors

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NXP Semiconductors
TDA19989_1
Preliminary data sheet
7.14.1 E-EDID reading
7.14.2 HDMI and DVI receiver discrimination
7.14 E-EDID
As a master interface for the EDID process, the DDC-bus is compliant with the I
specification and has the possibility of repeat/start condition to enable quick access to the
EDID content, as well as the possibility of reading a large EDID (with the use of segment
pointer).
TDA19989 has a whole I
(128 bytes) can be stored. The block can be read by the system microcontroller to
determine the supported video and audio format of the downstream site.
Remark: When the block is read by TDA19989, it generates an interrupt to warn the main
processor that the chip is ready to transmit the content. Once the content is read out by
the main processor, it can allow other blocks to be read if required.
This information is located in the E-EDID receiver part, in the ‘vendor-specific data block’
within the first CEA EDID timing extension.
If the 24-bit IEEE Registration Identifier contains the value 00 0C03h, then the receiver
will support HDMI, otherwise the device will be treated as a DVI device.
However, even through TDA19989 have directly access to that information, it is the task of
the host processor to ask to switch from DVI to HDMI mode.
Rev. 01 — 15 February 2010
2
C-bus page (page 09h) dedicated to the EDID where one block
HDMI 1.3 transmitter with HDCP and CEC support
TDA19989
© NXP B.V. 2010. All rights reserved.
2
C-bus
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