CDB4955A屬于開(kāi)發(fā)板套件編程器的評(píng)估演示板及套件。由凌云邏輯制造生產(chǎn)的CDB4955A評(píng)估和演示板及套件該系列產(chǎn)品提供了一種方便的方法，在經(jīng)過(guò)驗(yàn)證的實(shí)施環(huán)境中評(píng)估某些重點(diǎn)器件的性能或特性。評(píng)估方法通常有完善的文檔說(shuō)明，并且視乎具體情況由評(píng)估軟件提供支持。產(chǎn)品通常由印刷電路板組成，板上已裝有重點(diǎn)器件以及必要或有用的支持元器件，另外也可能包括其他組件，例如電纜或電源。對(duì)于數(shù)量特別多或類別獨(dú)特的器件類別(如 ADC、DAC 和開(kāi)關(guān)模式電源)，評(píng)估平臺(tái)可組合為一個(gè)單獨(dú)的產(chǎn)品系列。

描述 Description

The CS4954/5 provides full conversion from digital video formats YCbCr or YUV to NTSC and PAL Composite, Y/C (S-video) and RGB, or YUV analog video. Input formats can be 27 MHz 8-bit YUV, 8-bit YCbCr, or ITU R.BT656 with support for EAV/SAV codes. Video output can be formatted to be compatible with NTSC-M, NTSCJ, PAL-B,D,G,H,I,M,N, and Combination N systems. Closed Caption is supported in NTSC. Teletext is supported for NTSC and PAL.

特性 Features

● Six DACs providing simultaneous composite,S-video, and RGB or Component YUV outputs

● Programmable DAC output currents for low impedance (37.5 Ω) and high impedance (150 Ω) loads

● Multi-standard support for NTSC-M, NTSCJAPAN, PAL (B, D, G, H, I, M, N, Combination N)

● ITU R.BT656 input mode supporting EAV/SAV codes and CCIR601 Master/Slave input modes

● Programmable HSYNC and VSYNC timing

● Multistandard Teletext (Europe, NABTS, WST) support

● VBI encoding support

● Wide-Screen Signaling (WSS) support, EIA-J CPX1204

● NTSC closed caption encoder with interrupt

● CS4955 supports Macrovision copy protection Version 7

● Host interface configurable for parallel or I2C? compatible operation

● On-chip voltage reference generator

● +3.3 V or +5 V operation, CMOS, low-power modes, three-state DACs