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18
MCU--- RTD2120L-LF (U3)
Overview
This chip is the micro-processor of LCD monitor. It uses the design ware DW8051 of Synopsys as the 8051 core of
this chip and is compatible with other industry 8051 series. Also, 96Kbyte FLASH with 8 bit bus is embedded in this
chip which is licensed from TSMC 0.18um e-FLASH process. Here we use the package of PLCC44/LQFP48 if we
would like to have a discrete MCU controller or we make a multi-chip package with our LCD monitor controller to
form one chip package to save the cost of package and PCB material.
Features
• Operating voltage range : 3.0V to 3.6V
• 8051 core, CPU operating frequency up to 50MHz
• 4 clocks per machine cycle
• 256-byte internal RAM
• 512-byte external data RAM, including 256-byte DDC RAM(128-byte x 2) and 256-byte general purpose RAM
• 96K-byte flash memory, 64k for program and 32k for saving parameter
• Two DDC ports Compliant with VESA DDC1/2B/2Bi/CI
• Three channels of PWM DAC with programable frequency from 100K to 100Hz
• Watchdog timer with programmable interval
• Three 16-bit counters/timers (T0, T1, and T2)
• One PLL to provide programmable operating frequency and clock output, 2 clock output ports
• One full-duplex serial port
• Six interrupt sources with 2 external interrupts
• Four channels of 6-bit ADC
• Hardware In System Programming(ISP) capability, no boot code required
• Built-in Low voltage reset circuit
• Embedded 1.8V regulator
• Code protection
• Available in 44-pin PLCC or 48-pin LQFP package
Summary of Contents for VS11422
Page 6: ...6 2 Specification ...
Page 13: ...13 Block Diagram ...
Page 19: ...19 Application Block Diagram ...
Page 31: ...31 For analog a Double click appear as follow Figs b Click ...
Page 33: ...33 6 Troubleshooting Flow Chart ...
Page 45: ...45 9 PCB Layout Diagrams 9 1 Main Board ...
Page 46: ...46 ...
Page 47: ...47 9 2 Power Board ...
Page 48: ...48 ...
Page 49: ...49 9 3 Key Board ...
Page 50: ...50 10 Exploded Diagram and Spare Parts List 10 1 EPL ...