ViewSonic VX2235wm-4, Service Manual

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4. Circuit Description
14
ViewSonic Corporation
Confidential - Do Not Copy
VX2235wm-4
RTD2553V
LCD Monitor/MFM Controller
General
 Embedded dual DDC with DDC1/2B/CI
 Zoom scaling up and down
 No external memory required.
 Require only one crystal to generate all timing.
 Programmable 3.3V/5V detection reset output.
 Embedded crystal output to micro -controller.
 3 channels 8 bits PWM output, and wide range selectable PWM frequency.
Analog RGB Input Interface
 Integrated 8 -bit triple-channel 210/165 (optional) MHz ADC/PLL
 Embedded programmable Schmitt trigger of HSYNC
 Support Sync On Green (SOG) and various kinds of composite sync modes
 On -chip high-performance hybrid PLLs
 High resolution true 64 phase ADC PLL
 Y/Pb/Pr support up to HDTV 1080i resolution
 Support 2/1 Analog input (optional )
Digital Video Input Interface
 Support 8 -bit video (ITU 656) format input
 Support 16 -bit video (ITU 601) format input (optional)
 Built -in YUV to RGB color space converter & de-interlace
DVI Compliant Digital Input Interface (optional)
 Single l ink on-chip TMDS receiver
 Support to 165Mhz with long cable
 Adaptive algorithm for TMDS capability
 Data enable only mode support
 High -Bandwidth Digital Content Protection (HDCP 1.1) (optional only in H version)
 Enhanced protection of HDCP se cret key (optional only in H version)
Auto Detection /Auto Calibration
 Input format detection
 Compatibility with standard VESA mode and support user-defined mode
 Smart engine for Phase/Image position/Color calibration
Scaling
 Fully programmable zoom ratios
 Independent horizontal/vertical scaling
 Advanced zoom algorithm provides high image quality
 Sharpness/Smooth filter enhancement
 Support non -linear scaling from 4:3 to 16:9 or 16:9 to 4:3
Vivid Color.
 Dynamic Contrast Control (DC C)
 Independent Color Management (ICM)
 True 10 bits color processing engine
 sRGB compliance
 Advanced Dithering logic for 18 -bit panel color depth enhancement
 Dynamic overshoot -smear canceling engine
 Brightness and contrast control
 Progr ammable 10-bit gamma support
Output Interface
 Fully programmable display timing generator
 Flexible data pair swapping for easier system design.
 Programmable TCON function support
 Multi -output interface (RSDS/LVDS/TTL)on single PCB
 Spread -Spectrum DPLL to reduce EMI
 Fixed Last Line output for perfect panel capability
Host Interface
 Support MCU serial/parallel bus interface.
 Support MCU dual edge data latch.