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SAA7114E Datasheet(PDF) 4 Page - NXP Semiconductors |
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SAA7114E Datasheet(HTML) 4 Page - NXP Semiconductors |
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4 / 147 page  2004 Mar 03 4 Philips Semiconductors Product specification PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI data slicer and high performance scaler SAA7114 1.5 Digital I/O interfaces • Real-time signal port (R port), inclusive continuous line-locked reference clock and real-time status information supporting RTC level 3.1 (refer to document “RTC Functional Specification” for details) • Bidirectional expansion port (X port) with half duplex functionality (D1), 8-bit Y-CB-CR: – Output from decoder part, real-time and unscaled – Input to scaler part, e.g. video from MPEG decoder (extension to 16-bit possible) • Video image port (I port) configurable for 8-bit data (extension to 16-bit possible) in master mode (own clock), or slave mode (external clock), with auxiliary timing and handshake signals • Discontinuous data streams supported • 32-word × 4-byte FIFO register for video output data • 28-word × 4-byte FIFO register for decoded VBI data output • Scaled 4:2:2, 4:1:1, 4:2:0, 4:1:0 Y-CB-CR output • Scaled 8-bit luminance only and raw CVBS data output • Sliced, decoded VBI data output. 1.6 Miscellaneous • Power-on control • 5 V tolerant digital inputs and I/O ports • Software controlled power saving standby modes supported • Programming via serial I2C-bus, full read back ability by an external controller, bit rate up to 400 kbits/s • Boundary scan test circuit complies with the “IEEE Std. 1149.b1 - 1994”. 2 APPLICATIONS • Desktop video • Multimedia • Digital television • Image processing • Video phone applications. 3 GENERAL DESCRIPTION The SAA7114 is a video capture device for applications at the image port of VGA controllers. The SAA7114 is a combination of a two-channel analog preprocessing circuit including source selection, anti-aliasing filter and ADC, an automatic clamp and gain control, a Clock Generation Circuit (CGC), a digital multistandard decoder containing two-dimensional chrominance/luminance separation by an adaptive comb filter and a high performance scaler, including variable horizontal and vertical up and downscaling and a brightness, contrast and saturation control circuit. It is a highly integrated circuit for desktop video and similar applications. The decoder is based on the principle of line-locked clock decoding and is able to decode the colour of PAL, SECAM and NTSC signals into ITU 601 compatible colour component values. The SAA7114 accepts CVBS or S-video (Y/C) as analog inputs from TV or VCR sources, including weak and distorted signals. An expansion port (X port) for digital video (bidirectional half duplex, D1 compatible) is also supported to connect to MPEG or a video phone codec. At the so called image port (I port) the SAA7114 supports 8 or 16-bit wide output data with auxiliary reference data for interfacing to VGA controllers. The target application for the SAA7114 is to capture and scale video images, to be provided as a digital video stream through the image port of a VGA controller, for display via the frame buffer of the VGA, or for capture to system memory. In parallel SAA7114 also incorporates provisions for capturing the serially coded data in the vertical blanking interval (VBI data). Two principal functions are available: 1. To capture raw video samples, after interpolation to the required output data rate, via the scaler 2. A versatile data slicer (data recovery) unit. The SAA7114 also incorporates field-locked audio clock generation. This function ensures that there is always the same number of audio samples associated with a field, or a set of fields. This prevents the loss of synchronization between video and audio during capture or playback. The circuit is I2C-bus controlled (full write/read capability for all programming registers, bit rate up to 400 kbits/s). |
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