Vizio L42HDTV10A, GV42L HDTV I/O ports are configured as follows：, Microprocessor interface

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5. Microprocessor interface

When power is supplied and power key is pressed then the rest circuit lets Reset to low state that will reset the MTK8202 to initial state. After that the Reset will transits to high state and the MTK8202 start to work that microprocessor executes the programs and configures the internal registers. The execution speed of CPU is 162 MHz.

1. The I/O ports are configured as follows：

Pin name	Function	Type	Description
AD17	PWM	Output	Backlight Adjust
R3	GPIO2	Output	Panel on/off
V1	GPIO7	Output	System power
Y2	GPIO16	Output	LVDS on/off
R4	GPIO3	Output	ATSC POW on/off
AD22	IOSCL	Input / Output	SDA
AV22	IOSDA	Input / Output	SCL
W3	GPIO13	Output	HDMI Switch Select
Y4	GPIO_18	Output	MT8293 Reset
W4	GPIO_14	Output	MT8293 acknowledge to player
B19	ADC_IN0	Input	Key ADC detection
L4	IR	Input	IR Receiver
Y1	GPIO_15	Output	SYSTEM EEPROM Read / Write
T2	GPIO_23	Output	LED Backlight
L2	RESETn	Input	MT8202 RESET
R2	GPIO_1	Output	DTV & HDMI Select PIN
T4	GPIO_4	Output	DTV & ATV Select PIN

2. PIP/POP HARDWARE LIMITION:

CONFIDENTIAL – DO NOT COPY	Page 7-6
	File No. SG-0198

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Contents Vizio GV42L Hdtv Table of Contents Vinc Features Optical Characteristics SpecificationPower Supply Weight Physical weight Dimensions Physical dimension Width 1066 mmMounting Precautions SpeakerOperating Precautions Handling Precautions for Protection TV Source On Screen DisplayRGB Mode AV Component Mode Hdmi MODE： Confidential do not Copy Factory preset timings Pin Assignment Hdmi Connect PIN Assignment Type TV RF connector RGB Signal Main Board I/o Connections Theory of Circuit Operation MT8202 Application Video input YPbPr/Scart/D-connectorDecoder Support Formats Digital port2D-Graphic/OSD processor Supporting OSD mirror and upside downMicroprocessor interface I/O ports are configured as follows：Video processor 1.Color Management Dram Usage DDR Sdram V58C2128164SBI5 Application Pin description Power-UpFunctional Description Command Truth TableMode Register Set MRS Precharge Bank Activate Command Precharge Timing During Read Operation Read OperationPrecharge Timing During Write Operation Burst Stop CommandBurst Write Operation MX29LV160BTTC Flash Application Block Diagram Command Definitions Write COMMANDS/COMMAND Sequences READ/RESET Command WM8776 Application Reading Array DataAudio sample rate Slave mode Confidential do not Copy MT8293 Application Active port detection Tmds Digital CoreHdcp Decryption Video Data Conversion and Video OutputTDA8946 Application I2c Interface to Display ControllerBlock diagram Input configuration Output power measurement MT5351 Application Mode selectionGeneral Feature List CGMS/WSS Confidential do not Copy MX29LV320BTTC Flash Application Confidential do not Copy Block Diagram BUS OPERATION--1 BUS OPERATION--2 Write COMMANDS/COMMAND SequencesTable A. MX29LV320AT/B Command Definitions Reset Operation Standby ModeWrite Protect WP Software Command DefinitionsTable B. Write Operation Status Write Operation StatusFig C. Command Write Operation Fig D. Read Timing Waveforms Fig E. Reset Timing Waveform DDR Sdram NT5DS16M16CS-5T Application Block Diagram 16Mb xFunctional Description Pin Configuration 400mil Tsop II x4 / x8 Mode Register Operation Operating Mode Extended Mode Register Definition Extended Mode RegisterActive Truth Table a CommandsWrite ReadAuto Refresh Self RefreshReads OperationsRandom Read Accesses CAS Latencies Burst Length = 2, 4 or Read Command Write Command Data Input Write Data Output Read PC MODE1366X768 60HZ WaveformsCH1 Green # FB27 CH2 Vgavsync L22 CH1 Vgal R193 CH2 Avol R194 CH1 PCL CE70+ PCL CE70 AV&TV Mode AV1/AV2/TV Video Confidential do not Copy CH1 Dacbclk U23 PIN4 CH1 Dacmclk U23 PIN5 Component Mode Component 1/2 CH1YCBCRL2L19 CH2 2A33 U22 PIN11 CH1 AVL CE71+CH2 Auspl R304 Hdmi 1&2 Confidential do not Copy DTV HD Confidential do not Copy CH1 Vovsync DU9 PIN W1 CH1 Vode DU9 PIN W2 CH1 Vopclk DU9 PIN Monitor Display Nothing PC Mode Trouble shootingTV, Composite VIDEO1, 2, S-VIDEO is not Display Correctly COMPONENT1, 2 is not Display Correctly Hdmi is not Display Correctly Trouble of DC-DC Converter Trouble of DDC Reading System Block Diagram Wxga panel Block DiagramConfidential do not Copy Main Board Block Diagram Page Page Page Page Page Page Page