TDA19989 NXP Semiconductors, TDA19989 Datasheet - Page 25

• 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
7.11.1.1 Repeater function
7.11.1.2 SHA-1
7.12.1 Features
7.11.1 High-bandwidth digital content protection
7.12 CEC
7.11 HDCP processing
TDA19989 contains an HDCP function, which encrypts the transmitted stream content
(both video and audio). This function can be enabled and disabled via the I
The keys can be stored internally in OTP non-volatile memory or can be loaded via the
I
TDA19989 can be used in a repeater device according to the HDCP specification,
Rev 1.3. TDA19989 is able to store the KSV list of a maximum of 127 devices in a register
memory.
To deal with repeater, a SHA-1 calculation is performed by the transmitter and by the
downstream repeater. For security purposes and in order to relieve the microcontroller,
the SHA-1 has been implemented within TDA19989.
This calculation is worked out after the transmitter has loaded the KSV list (see HDCP
specification, Rev 1.3). If SHA-1 calculated by transmitter equals the SHA-1 calculated by
repeater, then an interrupt is sent.
TDA19989 with its embedded CEC block provides a complete solution to enable
Consumer Electronic Control (CEC) in product (DSC, DVC, PMP, UM PC). This eliminates
the need of any additional device to handle this feature thus improving BOM (Bill Of
Materials). CEC capability allows AV products (CEC enable) to communicate together
over the home appliance network which could be controlled using only one remote
control.
The CEC block manages low level transactions (compliant to CEC timing specification)
over the one bidirectional line. It translates CEC protocol in I
and vice versa. It manages CEC message reception and transmission compliant to CEC
protocol and provides the message to the system microcontroller (host processor).
For power consumption optimization purpose CEC could be enable or disable through
I
2
2
C-bus. As the keys are stored internally, the security is maximized.
C-bus register. The following sections describe CEC:
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Features
Clocking scheme
Receive and transmit CEC messages to host processor
Supports multiple CEC logical addresses
Supports CEC messages up to 16 bytes long
Programmable retry count
Comprehensive arbitration and collision handling
Rev. 01 — 15 February 2010
HDMI 1.3 transmitter with HDCP and CEC support
2
C-bus for the host processor
TDA19989
© NXP B.V. 2010. All rights reserved.
2
C-bus.
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