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ADE3800SXT Datasheet(PDF) 7 Page - STMicroelectronics |
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ADE3800SXT Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 138 page  7/138 ADE3800 General Description 2 General Description The ADE3800 family of devices is capable of implementing all of the advanced features of todays LCD monitor products. For maximum flexibility, an external microcontroller (MCU) is used for controlling the ADE3800 and other monitor functions. The ADE3800 architecture unburdens the MCU from all data-intensive pixel manipulations, providing an optimal blend of features and code customizing without incurring the cost of a 16-bit processor or memory. The key interactions between the monitor MCU and the ADE3800 can be broken down into the features shown in Table 1. Figure 1: ADE3800 Block Diagram Table 1: ADE3800 Features (Sheet 1 of 2) Feature Description of ADE3800 Operation Blocks Used Pages Power-up / Initialize When power is first applied, the ADE3800 is asynchronously reset from a pin. The MCU typically programs the ADE3800 with a number of default values and sets up the ADE3800 to identify activity on any of the input pins. All pre- configured values and RAMs, such as line-lock PLL settings, OSD characters, LCD timing values (output sequencer), scale kernels, gamma curves, sRGB color warp, APC dithering, output pin configuration (OMUX), etc. can be pre- loaded into the ADE3800. The typical end state is that the ADE3800 is initialized into a low power mode, ready to turn active once the power button is pressed. GLBL SMEAS LLK ADC OSD SCALER GAMMA SRGB TCON APC OMUX 18 36 30 21 72 53 71 68 102 92 94 Activity Detect When the monitor has been powered on, the inputs can be monitored for active video sources. Based on the activity monitors, the MCU chooses an input or power down state. SMEAS 36 ADE3800 SCLK Domain DCLK Domain INCLK Domain XCLK Domain MCU (SCL, SDA) Analog H&V Syncs Analog R, G, B Data TCON Out Data Syncs, & Clock I²C PWM Pulse Width Modulation SMEAS Sync Measure SRT Sync Retiming GLBL Global Control LLK Line Lock PLL SMUX Sync Multiplexer DMEAS Data Measure ADC (Digital) ADC (Analog) SCL Scaler TCON Timing Controller FLK Flicker Detection DCLK PLL, FM SCLK PLL |
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