IT66121FN View Datasheet(PDF) - ITE Tech. INC.
Part Name
Description
Manufacturer
IT66121FN Datasheet PDF : 39 Pages
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IT66121FN
Functional Description
IT66121 is a low-power version of HDMI 1.3 transmitter and provides complete solutions for HDMI
Source systems by implementing all the required HDMI functions. In addition, advanced processing
algorithms are employed to optimize the performance of video processing such as color space
conversion and YCbCr up/down-sampling. The following picture is the functional block diagram of
IT66121, which describes clearly the data flow.
PCSCL PCSDA ROMSCL ROMSDA
SYSRSTN
PCADR
PCLK
VSYNC
HSYNC
DE
D[23:0]
SCK/MCLK
WS
I2S0
I2S1
I2S2
I2S3/SPDIF
INT
Configuration
Register Blocks
Video Data
Capture
&
DE Generator
Audio Data
Capture
I2C Slave
(to host)
I2C Master I2C Master
(to HDCP
(HDCP
EEPROM) Controller) CEC
PHY
Color Space
Conversion
4:2:2
4:4:4
Pixel Repeat
HDCP Cipher
&
Encryption Enginer
TMDS
Transmitter
(DVI/HDMI)
Interrupt Controller
Figure 2. Functional block diagram of IT66121
DDCSCL
DDCSDA
CEC
TX2P/M
TX1P/M
TX0P/M
TXCP/M
HPD
Video Data Processing Flow
Figure 3 depicts the video data processing flow. For the purpose of retaining maximum flexibility, most
of the block enabling and path bypassing are controlled through register programming. Please refer to
IT66121 Programming Guide for detailed and precise descriptions.
As can be seen from Figure 3, the first step of video data processing is to prepare the video data
(Data), data enable signal (DE), video clock (Clock), horizontal sync and vertical sync signals
(H/VSYNC). While the video data and video clock are always readily available from input pins, the
preparation of the data enable and sync signals require special extraction process (Embedded Ctrl.
Signals Extraction & DE Generator) depending on the format of input video data.
All the data then undergo a series of video processing including color-space conversion and YCbCr
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Nov-2011 Rev:0.99 7/39
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