General Description

The AK8825 is a HD/SD TV Video Encoder with onchip 3-channel 10bit DAC. As input data, in SDTV encoder mode, SMTE-125M / ITUR-R.BT601, 656 compatible Y/Cb/Cr 4:2:2 formats (8bit) are accepted and in HDTV encoder mode, SMPTE-274M (1080i), SMPTE296M (720p) compatible Y/Cb/Cr 4:2:2 formats (8bit x 2) are accepted.

As input data capture method, either a Synchronous mode to be made by detecting encoded EAV signal or a mode to synchronize with externally-fed H/V SYNC signal is selectable.

Outputs of CVBS / SDY / SDC and HDY / HDPB / HDPR and R / G / B analog signal can be output exclusively.

VBI signal and Macrovision signal can be also superimposed on output in addition to Video signals by register setting. AK8825 supports I2C compatible interface as Micro-Processor interface.

特性 Features

Component Video Encoder

- Compatible Input Data

SMPTE125M-1995 / ITU-R BT601 (525i/625i)

SMPTE293M-1996 / ITU-R BT1358 (525p/625p)

SMPTE274M-1998 (1080i)

SMPTE296M-2001 (720p)

- Input Signal Format (525i / 625i, 525p / 625p, 1080i, 720P)

Y/Cb/Cr 4:2:2 (8bit x 1: 525i/625i)

Y/Cb/Cr 4:2:2 (8bit x 2: 525p/625p/1080i/720p)

RGB 6:6:6

RGB 5:6:5

- Input Clock

27MHz (525i / 625i / 525p / 625p) / 74.25MHz (1080i/720p)

- Output Signals

Y/Pb/Pr Interlace

Y/Pb/Pr Progressive

(EIA 770.2, EAI 770.3)

- Input Signal Synchronization

ITU-R.BT 656 I/F (EAV Decode)

Slave operation by HSYNC / VSYNC

(525i: ITU-R. BT601 Compatible 625i / 525p / 625p / 1080i / 720p; CEA-861-D Compatible)

- VBID (CGMS-A), CC/XDS, WSS, CEA-805-B (Type A/B)

- Macrovision 525i / 625i Rev.7.1.1L, 525p/625p Macrovision Progressive 1.2

- Internal Color bar Generator

- Internal Black Burst Generator

- Adjustable Y / Pb / Pr Delay Function

NTSC / PAL Composite Video Encoder

- NTSC-M, PAL-B, D, G, H, I. M, N Encoding

- Composite Video Output / S-Video Output

- Compatible Input Data

SMPTE125M-1995 / ITU-R BT601(525i/625i) Y/Cb/Cr 4:2:2 (8bit x 1)

RGB 6:6:6

RGB 5:6:5

- Input Signal Synchronization

ITU-R.BT 656 I/F (EAV Decode)

Slave operation by HSYNC / VSYNC

( 525i / 625i: ITU-R. BT601 Compatible)

- Input Clock

27MHz

- VBID(CGMS-A), CC/XDS, WSS

- Macrovision Rev. 7.1.L

RGB Video DAC

- RGB output

- Input Data Format

RGB 6:6:6

RGB 5:6:5

- Input Clock

54MHz (max)

Common Specification

- 10bit DAC x 3ch (max operating speed 150MHz)

- I2C BUS I/F (400kHz) compatible

- Power Down mode

- Internal VREF Circuit

- 3.0V / 1.8V VCC

- Package

- 57pin FBGA (5mm x 5mm)

- 48pin QFN (7.2mm x 7.2mm)