CS4954/55 NTSC/PAL Digital Video Encoders0 pages

01 CS4954 CS4955 'CIRRUS LOGIC' NTSC/PAL Digital Video Encoder Features  Six DACs providing simultaneous composite,S-video, and RGB or Component YUV outputs Օ Programmable DAC output currents for low impedance (37.5 Q) and high impedance (150 Q) loads  Multi-standard support for NTSC-M, NTSC-JAPAN, PAL (B, D, G, H, I, M, N, Combination N) Օ ITU R.BT656 input mode supporting EAV/SAV codes and CCIR601 Master/Slave input modes  Programmable HSYNC and VSYNC timing Օ Multistandard Teletext (Europe, NABTS, WST) support  VBI encoding support Օ Wide-Screen Signaling (WSS) support, EIA-J CPX1204  NTSC closed caption encoder with interrupt Օ CS4955 supports Macrovision copy protection Version 7  Host interface configurable for parallel or PC® compatible 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 forխmats 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, NTSC-J, PAL-B,D,G,H,I,M,N, and Combination N systems. Closed Caption is supported in NTSC. Teletext is sup-ported for NTSC and PAL. Six 10-bit DACs provide two channels for an S-Video output port, one or two composite video outputs, and three RGB or YUV outputs. Two-times oversampling reduces the output filter requirements and guarantees no DAC-related modulation components within the speci-fied bandwidth of any of the supported video standards. Parallel or high-speed I2C compatible control interfaces are provided for flexibility in system design. The parallel interface doubles as a general purpose I/O port when the CS4954/5 is in PC mode to help conserve valuable board area. The CS4954 and CS4955 are available in a 48-pin TQFP and operate in -40 to +85°C ambient temperature. The CDB4954/55 Customer Demonstration board is also available. Please refer to "Ordering Information" on page 2. _VAA_ operation ͕ On-chip voltage reference generator  +3.3 V or +5 V operation, CMOS, low-power modes, CLK SCL SDA PDAT[7:0] RD WR PADR XTAL_IN XTAL_OUT PC Interface Control Registers Output I-aLPF InterpolateI \ T-_ Chroma Amplifier »-| Chroma Modulate C Host Parallel Interface CVBS Y R G B VREF ISET r1 i՗ 3 Burst Insert Color Sub-carrier Synthesizer I three-state DACs |Chroma Interpolate" TTXDAT TTXRQ Teletext Encoder YCbCr to RBG Color Space Converter La lJ" VD[7:0] HSYNC VSYNC FIELD INT RESET Video Formatter Yl-1 Luma Interpolate | | Luma Amplifier" Video Timing Generator _Y_ Sync Insert RGBL RGB Current I Reference f DGND TEST m CIRRUS LOGIC Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved) www.cirrus.com SEPTEMBER '06 DS278F6 1