In addition, NT68673UMFG includes an integrated 8-Bit Microcontroller (MCU). It contains an
8-bit 8031 micro-controller, 5,120-bytes internal data memory, eight 7-bit resolution A/D
Converter, 10- channel 8-bit resolution PWM DAC, two16-bit timer/counters, and a UART.
Except those, it has two channel hardware DDC solution, and VESA 2Bi/2B+ master/slave I2C
bus interface. It can support up to External 512 K Bytes SPI Flash memories for program
memory.
2.) EEPROM: We use 24C16 EEPROM to store DDC (Display Data Channel) data. The end-users’
setting data is stored in the 24C16 EEPROM. Each timing mode is allocated with 16 bytes of
memory space for information such as Sync frequencies, polarities… etc. PC can access the
EEPROM data indirectly through the D-sub-SDA and D-sub-SCL channels. (I
ͅ
C communication)
4.3.3 VGA
Input
Signal R, G, B input through CN102 #1, #2, #3. Signal HSYNC and VSYNC input through CN102 #13 and
#14, and C129, R135, C130, R136 filtering. Then the analog signal enters U105, and then U105 deals with it
internally. In addition, D104, D105, D102,D103 (the four are BAV99), ZD102, ZD103, ZD104, ZD105, ZD106
(they are constant voltage diode of 6V2) are ESD protector. Signal DDC-SCL inputs via CN102 #15, and then
passes through ZD106 for ESD protection, goes into U105 #41. Signal DDC-SDA inputs via CN102 #12, and
then passes through ZD105 for ESD protection, goes into U105 #42. CN102 #5 is defined as cable detect pin,
this detector realizes via R125,The PC-5V of U105 is supplied by PC via CN102 #9 with D101.
4.3.4 Button
Control
Button “Key-Power” is defined as power on/off, which is connected to U105 # 74 through CN104 #8.
Button “Key-2” is defined as two functions of selecting and adjustment, which is connected to
U105#113through CN104 #2.
Button “Key-Up” is defined as plus, which is connected to U105 # 112 through CN104
# 4
Button “Key-Down” is defined as minus, which is connected to U105 # 111 through CN104 # 3.
Button “Key-1” is defined as two functions of menu and exit, which is connected to U105 # 47 through
CN104 # 1.
LED indicator on the front bezel is defined as follows:
a. When press button “Key-Power”, U105 # 74 is pulled high and U105 # 103 is pulled low, so Q107 is
conducted and the LED indicator is blue.
b. When in power-saving mode, U105 # 108 is pulled high and U102 # 1 is pulled down, so Q108 is conducted
and the LED indicator is orange.
ViewSonic Corporation
VX2433wm-1
VX2433wm-CN
CONFIDENTIAL – DO NOT COPY
44
Summary of Contents for VX2433wm-1
Page 6: ...ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 3...
Page 40: ...BACKCOVER ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 37...
Page 41: ...PANEL BEZEL ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 38...
Page 42: ...KEYPAD CHASIS ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 39...
Page 44: ...IF BOARD ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 41...
Page 86: ...7 Block Diagram ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 83...
Page 88: ...VGA INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 85...
Page 89: ...DVI INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 86...
Page 90: ...HDMI INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 87...
Page 91: ...SCALER ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 88...
Page 92: ...AUDIO ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 89...
Page 93: ...ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 90...
Page 94: ...POWER SUPPLY ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 91...
Page 95: ...INVERTER SUPPLY ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 92...
