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STPCC0180BTI3 Arkusz danych(PDF) 7 Page - STMicroelectronics |
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STPCC0180BTI3 Arkusz danych(HTML) 7 Page - STMicroelectronics |
7 / 51 page GENERAL DESCRIPTION 7/51 Issue 1.2 The video output pipeline incorporates a video- scaler and color space converter function and pro- visions in the CRT controller to display a video window. While repainting the screen the CRT con- troller fetches both the video as well as the normal non-video frame buffer in two separate internal FIFOs (256-Bytes each). The video stream can be color-space converted (optionally) and smooth scaled. Smooth interpolative scaling in both hori- zontal and vertical directions are implemented. Color and Chroma key functions are also imple- mented to allow mixing video stream with non-vid- eo frame buffer. The video output passes directly to the RAMDAC for monitor output or through another optional color space converter (RGB to 4:2:2 YCrCb) to the programmable anti-flicker filter. The flicker filter is configured as either a two line filter with gamma correction (primarily designed for DOS type text) or a 3 line flicker filter (primarily designed for Win- dows type displays). The flicker filter is optional and can be software disabled for use with video on large screen areas. The Video output pipeline of the STPC Consumer interfaces directly to the internal digital TV encod- er. It takes a 24 bit RGB non-interlaced pixel stream and converts to a multiplexed 4:2:2 YCrCb 8 bit output stream, the logic includes a progres- sive to interlaced scan converter and logic to in- sert appropriate CCIR656 timing reference codes into the output stream. It facilitates the high quality display of VGA or full screen video streams re- ceived via the Video input port to standard NTSC or PAL televisions. The STPC Consumer core is compliant with the Advanced Power Management (APM) specifica- tion to provide a standard method by which the BIOS can control the power used by personal computers. The Power Management Unit module (PMU) controls the power consumption by provid- ing a comprehensive set of features that control the power usage and supports compliance with the United States Environmental Protection Agen- cy’s Energy Star Computer Program. The PMU provides following hardware structures to assist the software in managing the power consumption by the system. - System Activity Detection. - 3 power-down timers detecting system inactivity: - Doze timer (short durations). - Stand-by timer (medium durations). - Suspend timer (long durations). - House-keeping activity detection. - House-keeping timer to cope with short bursts of house-keeping activity while dozing or in stand-by state. - Peripheral activity detection. - Peripheral timer detecting peripheral inactivity - SUSP# modulation to adjust the system perform- ance in various power down states of the system including full power on state. - Power control outputs to disable power from dif- ferent planes of the board. Lack of system activity for progressively longer period of times is detected by the three power down timers. These timers can generate SMI in- terrupts to CPU so that the SMM software can put the system in decreasing states of power con- sumption. Alternatively, system activity in a power down state can generate SMI interrupt to allow the software to bring the system back up to full power on state. The chip-set supports up to three power down states: Doze state, Stand-by state and Sus- pend mode. These correspond to decreasing lev- els of power savings. Power down puts the STPC Consumer into sus- pend mode. The processor completes execution of the current instruction, any pending decoded in- structions and associated bus cycles. During the suspend mode, internal clocks are stopped. Re- moving power down, the processor resumes in- struction fetching and begins execution in the in- struction stream at the point it had stopped. A reference design for the STPC Consumer is available including the schematics and layout files, the design is a PC ATX motherboard design. The design is available as a demonstration board for application and system development. The STPC Consumer is supported by several BIOS vendors, including the super I/O device used in the reference design. Drivers for 2D accel- erator, video features and EIDE are availaible on various operating systems. The STPC Consumer has been designed using modern reusable modular design techniques, it is possible to add or remove the standard features of the STPC Consumer or other variants of the 5ST86 family. Contact your local STMicroelecton- ics sales office for further information. |
Podobny numer części - STPCC0180BTI3 |
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Podobny opis - STPCC0180BTI3 |
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