ViewSonic VP2650WB Service Manual page 25

firmware code.
Others, the scalar IC has a I/O port to detect Pivot device whether its level change, once
I/O port level change, the scalar will auto make OSD Menu window disappear.
Moreover, when input timing VS over 75Hz, the scalar will along with external SDRAM
memory to do FRC function, and make image can work normally.
(b) IC introduction:
1.)
Genesis GM5862H-LF SCALER IC:
resolution up to WUXGA. The gm5862H leverages Genesis patented advanced
image-processing technology, as well as a proven integrated ADC/PLL and an
Ultra-Reliable DVI® compliant digital receiver to deliver a high-quality solution for
mainstream dual input monitors. The gm5862H also includes an ITU656 video input port
with color space converter that makes it an attractive solution for low cost MFM and TV
applications. The output section contains a 24-bit TTL output interface and a dual
channel LVDS transmitter for direct interfacing of commercially available LVDS LCD
panel modules. In addition, GM5862H includes an integrated X86 OCM with SPI
compatible interface, advanced color control features, a multicolor proportional font OSD
engine, and a number of system I/O components.
2.) EEPROM:
HDCP key. There are 10 user timing modes are automatically saved in it. Each timing
mode is allocated with 22 bytes of memory space for information such as Sync
frequencies, polarities... etc. PC can access the EEPROM data indirectly through the
SDA and SCL channels of DVI and D-sub (IIC communication). The digital and analog
DDC data are stored in two 24C02s EEPROM.
3.) Flash:
GM5862H
can access code from it and deal with it by CPU engine within the scalar.
ViewSonic Corporation
Genesis GM5862H with analog (RGB), DVI and HDCP function, and support
Use 24C16 EEPROM to store monitor user data and user preset timings and
Use 25LV040 flash rom to save firmware program in order that the scalar IC
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Confidential - Do Not Copy VP2650wb-1