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CAT6611 Datasheet PDF : 29 Pages
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CAT6611
Supported Input Video Formats
Table 1 lists the input video formats supported by CAT6611.
Input Pixel clock frequency (MHz)
Color Video Input
Space Format Chs
Bus
Width
Hsync/
Vsync
480i 480p XGA 720p 1080i SXGA 1080p UXGA
3
RGB 4:4:4
1
24
Separate 13.5 27 65 74.25 74.25 108 148.5 162
12
Separate 13.5 27 65 74.25 74.25
3
4:4:4
1
24
Separate 13.5 27 65 74.25 74.25 108 148.5 162
12
Separate 13.5 27 65 74.25 74.25
YCbCr
4:2:2
Separate 13.5 27
2 16/20/24
Embedded 13.5 27
65 74.25 74.25 108 148.5 162
65 74.25 74.25 108 148.5 162
Separate 27 54 130 148.5
1 8/10/12
Embedded 27 54 130 148.5
Table 1. Input video formats supported by CAT6611
Notes:
1. Table cells that are left blanks are those format combinations that are not supported by CAT6611.
2. Input channel number is defined by the way the three color components (either R, G & B or Y, Cb & Cr) are
arranged. Refer to Video Data Bus Mappings starting page 17 for better understanding.
3. Embedded sync signals are defined by CCIR-656 standard, using SAV/EAV sequences of FF, 00, 00, XY.
4. The original pixel clock of 480i is 13.5MHz. HDMI standard mandates that a 27MHz pixel clock be used and pixel
repeating is employed to keep the frequency range of the HDMI link within control.
Audio Data Capture and Processing
CAT6611 takes in four I2S inputs as well as one S/PDIF input of audio data. The four I2S inputs allow
transmission of 8-channel uncompressed audio data at up to 192kHz sample rate. The S/PDIF input
allows transmission of uncompressed PCM data (IEC 60958) or compressed multi-channel data (IEC
61937) at up to 192kHz.
Down-sampling factor of 2
192kHz → 96kHz
96kHz → 48kHz
176.4kHz → 88.2kHz
88.2kHz → 44.1kHz
Down-sampling factor of 4
192kHz → 48kHz
176.4kHz → 44.1kHz
Table 2. Audio down-samplings supported by CAT6611
Note that MCLK input is optional for CAT6611. By default CAT6611 generates the MCLK internally to
process the audio. Neither I2S nor S/PDIF inputs requires MCLK input, coherent or not. However, if the
user prefers inputing MCLK from external audio source, such configuration could be enabled through
register setting. Refer to CAT6611 Programming Guide for such setting.
Audio data can be down sampled to support a wider range of audio DACs. CAT6611 offers audio
The CAT logo is a registered trademark of Chip Advanced Technology
2007 Chip Advanced Technology Inc. – All Right Reserved.
June-2007 Rev:1.0a 10/29
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