Overview

The AK8858 is a single-chip digital video decoder for composite, s-video, 525i/625i component and 525p/625p component video signals. Its output data is in YCbCr and RGB format. Its pixel clock is generated internally and synchronized with the input signal. Microprocessor access is via I2C interface.

特性 Features

■ Decodes composite and S-Video signals NTSC/ PAL-B, D, G, H, I, N, Nc, M, 60 /SECAM

■ Decode 525i / 625i YPbPr component video signals

■ Decode 525p / 625p YPbPr component video signals

■ 10 input channel

■ 10-bit 54MHz ADC 2 channel

■ Internally built PLL

■ Internal analog bandwidth filter

■ Programmable Gain Amp (PGA) (-3.25dB～ 10dB)

■ Adaptive automatic Gain Control (AGC)

■ Auto Color Control (Composite and S-Video signals)

■ Image adjustment (Contrast, Brightness, Saturation, HUE, Sharpness)

■ Automatic input signal detection (NTSC/ PAL/ SECAM detect、 Interlace/ Progressive detect)

■ Adaptive 2-D Y/C separation

■ Output data format

YCbCr 4:2:2 or RGB 8:8:8

■ Output interface

(YCbCr)

Interlace: ITU-R BT.656 (8bit 27MHz) and 16bit 13.5MHz with EAV/ SAV

Progressive: 16bit 27MHz and 8bit 54MHz with EAV/ SAV

(RGB)

Interlace: 8bit:8bit:8bit 13.5MHz with EAV/ SAV

Progressive: 8bit:8bit:8bit 27MHz with EAV/ SAV

*EAV/ SAV output can be disabled via register

■ HD, VD, DVALID and FIELD (VD, DVALID, FIELD can be select up to 2 output via register setting)

■ Closed Caption / WSS / CGMS-A signal decoding (output via register).

■ Macrovision signal detection (Rovi certification)

■ I2C control

■ Powerdown function

■ Internal VREF

■ Core supply voltage: 1.70～2.00V

■ I/O power supply: 1.70～3.60V

■ Operating temperature: ?40°C～105°C

■ 80-pin LQFP package (12.0mm x 12.0mm)