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4.4 INTRODUCTION OF IC
STUM56AK(U401):
integrate ADC, OSD, SCALER, MCU, LVDS, convert analog RGB
into digital and room and shrink scaling output to LCD panel.
PIN Function:
AIC1084-33PM (U702):
DC power convert, used to 5v convert 3.3v.
LT1117-18(U701):
DC power convert, used to 5v convert 3.3v.
Pin Symbol
Description
70
SDO
SPI flash serial data output; Input w/5V-tolerant
71
CSZ
SPI flash chip select; output
72
SCK
SPI flash serial select; output
73
SDI
SPI flash serial data input; output
65
DDCA_SDA/RS232_TX DDC data for analog interface; 4mA driving
strength/UART transmitter/GPIO; I/O w/5V-tolrant
66 DDCA_SDA/RS232_RX DDC data for analog interface/UART
transmitter/GPIO;Input w/5V-tolrant
36
DDCD_SDA
DDC data for DVI interface; 4mA driving strength;
I/O w/5V-tolerant
37
DDCD_SCL
DDC clock for DVI interface; Input w/5V-tolerant
19
RST
Chip reset; High reset; Input w/5V-tolerant
22
RSTN
Chip reset; Low reset; Input w/5W-toerant
11 VCTRL
Regulator
control;
Output
63 HSYNCO
Analog
HSYNC
input
64 VSYNCO
Analog
VSYNC
input
62
REFP
Internal ADC top de-coupling pin
61
REFM
Internal ADC bottom de-coupling pin
51 REXT
External resistor 390 ohm to AVDD
_
DVI
21
PWM1
PWM1; 4mA driving strength; Output
29
PWM0
PWM0; 4mA driving strength; Output
4 BYPASS
For
External
Bypass
Capacitor
33
XIN
Xin; Crystal Oscillator Input
34
XOUT
Xout; Crystal Oscillator Output
44
、
50 AVDD
_
DVI
DVI Power 3.3V
60
AVDD
_
ADC
ADC Power 3.3V
52
AVDD
_
PLL
PLL Power 3.3V
34
AVDD
_
MPLL
MPLL Power 3.3V
14
、
67
、
95
、
103
、
115
VDDP
Digital Output Power 3.3V
13
、
38
、
41
、
47
、
96
、
116
VDDC Digital
Core
Power
1.8V
15
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG920-1
Содержание VG920-1
Страница 24: ...Power Block Function 21 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 39: ...Sep2 Inpute the S N and execute Enter 36 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 40: ...37 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 41: ...Sep3 Key the Enter and write the data 38 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 42: ...Sep4 If ddc program OK and show data compare ok 39 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 43: ...5 7 Packing For Shipping 40 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 47: ...Picture 9 Picture 10 Picture 11 Picture 12 Picture 13 44 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 52: ...6 Trouble Shooting Flow Chart 49 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 78: ...11 PCB Layout Diagram 11 1 MAIN BOARD PCB TOP VIEW 75 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 79: ...11 2 MAIN BOARD PCB BUTTON VIEW 76 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 80: ...11 3 KEYBOARD TOP VIEW 11 4 KEYBOARD BUTTON VIEW 77 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 81: ...11 5 POWER PCB TOP VIEW 78 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 82: ...11 6 POWER PCB BUTTON VIEW 79 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 83: ...11 7 AUDIO PCB TOP VIEW 80 ViewSonic Corporation Confidential Do Not Copy VG920 1...
Страница 84: ...11 8 AUDIO PCB BUTTON VIEW 81 ViewSonic Corporation Confidential Do Not Copy VG920 1...