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ViewSonic Corporation
Confidential - Do Not Cop VP950b
4.4 INTRODUCTION OF IC
TSUMO5PCWHL-LF (U401): integrate ADC, OSD, SCALER, MCU, LVDS, convert
analog RGB into digital and room and shrink scaling output to LCD panel.
PIN Function:
AP1117E33LA (U707,U705): DC power convert, convert to 3.3v.
AZ1117D-1.8EI (U708): DC power convert, convert to 1.8v.
SST25LF020A-33-4C-SAE (U402): SST’s serial flash family features a four-wire,
SPI-com-patible interface that allows for a low pin-count package occupying
less board space and ultimately lowering total system costs. The
Pin Pin Name Function
37 SDO SPI flash serial data output
38 CSZ SPI flash chip select
39 SCK SPI flash serial select
40 SDI SPI flash serial data input
30 DDCA_SDA/RS232_TX DDC data for analog interface; 4mA driving strength
UART transmitter/GPIO
31 DDCA_SCL/RS232_RX DDC data for analog interface
UART transmitter/GPIO
100 DDCD_SDA DDC Data and HDCP Slave Port Data for DVI Interface;
4mA driving strength
1 DDCD_SCL DDC Clock and HDCP Slave Port Data for DVI Interface;
4mA driving strength
80 BYPASS For External Bypass Capacitor
84 RST Chip reset; High reset
52 VCTRL Regulator control
27 HSYNCO Analog HSYNC input
28 VSYNCO Analog VSYNC input
26 REFP Internal ADC top de-coupling pin
25 REFM Internal ADC bottom de-coupling pin
15 REXT External resistor 390 ohm to AVDD_33
Chip Configuration Input
MODE[1:0] Chip Operation
53、52 MODE[1：0]
Input
00 Normal Operation
96 XIN Xin; Crystal Oscillator Input
97 XOUT Xout; Crystal Oscillator Output
8,14,16,24,
98
AVDD＿33
DVI Power 3.3V
32,49,56,75 VDDP Digital Output Power 3.3V
34,51,66,82 VDDC Digital Core Power 1.8V
2,5,11,29,3
3,50,57,76,
79,83
GND Ground
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