CS7808 datasheet(19/52 Pages) CIRRUS

19 / 52 page

CS7808

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Built in PLLs generate all required clocks from

27 Mhz input clock

3.2.4

Memory Controller

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Supports SDRAM, and SGRAM, from 2 Mbytes to

32 Mbytes

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Supports multiple banks of FLASH and ROM up to

16 Mbytes

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32-bit data bus for DRAM, 8 or 16-bit data bus for

ROM

3.2.5

Data Flow Engine

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2432 bytes of internal memory

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DMA to/from main RAM into local SRAM

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Supports endian conversion and byte, short, long

data formats on DMA

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Supports block transfers for graphics bit blits

3.2.6

Audio Interface

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Supports PCM, I2S and IEC-958 outputs at up to

96 KHz output rate

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8 output channels, 2 input channels

3.2.7

Video Input

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NTSC/PAL video decoder input interface

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Built in variable down scaling, handles CCIR 601 to

QCIF input formats

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Video input image can be displayed in small win-

dow, or as main picture

3.2.8

External Interface

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Serial I2C

® master and slave port

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29 independent fully programmable bi-directional

I/O pins

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8 edge or level detection interrupt pins

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Hardware assisted support for infrared remote de-

vices, such as remote control, infrared keyboard,

mouse, printer, and more

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Programmable parallel host master and slave inter-

face supports many formats including ATAPI, ISA,

and more

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Serial interface supports AC-97 and other standard

MODEM CODEC protocols

3.2.9

Video Processor

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Supports 24-bit 4:2:0 and 4:2:2 video modes and

16-bit true color graphics modes.

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On screen display module supports 2-bit, 4-bit, or 8-

bit pixel modes, while supporting 3 separate regions

and 16 transparency overlay levels

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Picture-in-picture module includes horizontal and

vertical downscaling with programmable output siz-

es, positions, and borders

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Overlay mixer with RGB to YUV conversion and

output formatting

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Supports 4:2:0, 4:2:2, YUV655, RGB565 and

RGB555 frame buffer inputs

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Outputs 4:2:2 video in CCIR-601 or CCIR-656 for-

mat

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High quality scaling using a vertical and a horizontal

16 taps polyphase programmable filter and sup-

ports any size image up to 768x576

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Programmable sharpening and de-blocking filters

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5 taps programmable adaptive anti-flicker filtering

for graphics source

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Master or Slave video sync configuration

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Multiple video plains overlay (main video / video in-

put / picture_in_picture / picture/on_screen / dis-

play/cursor)

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Gamma correction

3.2.10

Cursor

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4-bit color

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16-level alpha blending

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