ViewSonic VX2262WM Service Manual - Page 19

4.4 INTRODUCTION OF IC TSUMO58CWHL-LF(U401): integrate ADC, OSD, SCALER, MCU, LVDS, convert analog RGB into digital and room and shrink scaling output to LCD panel. PIN Function: Pin 41 42 43 44 34 35 5 6 102 108 103 32 33 31 30 7 37 128 127 8,12,20 21 40,54,58-60,65,66,71,87,107 112,114 53,74,104,126 1,11,17,29,52,62,63,68,69,72, 88,101,105,106,113 Symbol SDO CSZ SCK SDI DDCA_SDA/RS232_TX DDCA_SCL/RS232_RX DDCD_SDA DDCD_SCL BYPASS RST VCTRL HSYNCO VSYNCO REFP REFM REXT MODE XIN XOUT AVDD＿33 AVDD＿18 VDDP VDDC GND Description SPI flash serial data output SPI flash chip select SPI flash serial select SPI flash serial data input DDC Data for analog interface/ UART Ttransmitter / General Purpose Input/Output; 4mA driving strength DDC Clock for analog interface/ UART Receiver / General Purpose Input/Output; 4mA driving strength DDC Data and HDCP Slave Serial Port Data for DVI/HDMI Interface; 4mA driving strength DDC Clock and HDCP Slave Serial Port Data for DVI/HDMI Interface For External Bypass Capacitor Chip reset; High reset Regulator control Analog HSYNC input Analog VSYNC input Internal ADC top de-coupling pin Internal ADC bottom de-coupling pin External resistor 390 ohm to AVDD_33 Chip Configuration Input; 10K ohm pull-low for normal operation Xin; Crystal Oscillator Input Xout; Crystal Oscillator Output ADC Analog Power 3.3V ADC Analog Power 1.8V Digital Output Power 3.3V Digital Core Power 1.8V Ground ViewSonic Corporation - 19 - Confidential - Do Not Cop VX2262wm/wmp