STV3550B STMicroelectronics, STV3550B Datasheet - Page 59

• Manufacturer Part Number: STV3550B
• Manufacturer: STMicroelectronics

Specifications of STV3550B

• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Compliant

STV3550
5
Note:
5.1
5.1.1
5.1.2
5.1.3
Color space adaptor (CSA) and interpolator
Output stage
Some descriptions in this section are not applicable for LCD applications.
Main features
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General description
At the output of the picture compositor, the video format is 3x10-bit RGB 4:4:4. The video
signal is first sent to a color space adaptor that outputs RGB signals. The bit stream is then
interpolated in order to double the bit rate. The interpolation function can be used in the
event of a double-rate OSD, or mixed mode (OSD and video).
Figure 39. CSA and interpolation diagram
Up-sampling
In this sub-block, incoming RGB data are up-converted using the CLK_DAC clock. There
are two possible cases:
1.
2.
RGB to YUV convertion
Up-sampling by two
GFX_ACTIVE programmable delay
the CLK_PIX and CLK_DAC clock frequency is the same: only the clock domain is
changed,
or the CLK_DAC clock frequency is twice the CLK_PIX clock frequency: the clock
domain is changed and the outputs signals are padded with a zero level every two
samples.
CLK_PIX
CTL (RGB/YCrCb)
RGB to YCrCb
Conversion
Matrix
Video
Interpolator
by 1 or 2
On/Off
CLK_DAC
Output stage
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