LG MG810c, Service Manual

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3. H/W Circuit Description
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3.7 LCD & Camera Interface
A. LCD Interface
In MG810c, main & sub LCD is displayed by memory interface through Camera back-end-chip.
In case that the camera-back-end chip ( Hera ) is bypass-mode, LCD is operated by DBB and
memory. MG810c can display 26200 color according to 18-bit data line. The size of Module is
39*53.8*3.5. The module driver IC is HD66784. The LCD interface has 18-bit data line, CS, reset,
Write strobe from DBB and Memory. The signals go to Hera that is by-pass mode that case. The
signals go to LCD module through Hera and filters.
The module include: LCD : Main = 2.0” QCIF TFT LCD
Sub = 1.17” 96*96 TFT LCD
B. Camera Interface
In MG810c, Camera Back-End-chip is applied for camera flow control and power control respectively.
The full scheme is shown in Figure 26. The camera back end chip ( Hera ) supports 1-mega pixel
camera. The chip has 8-bit data line, clock line and I2C.
The U202 is Camera Application processor( Corelogic’s CL8524SN ). It also supports 80-type LCD
interface. It has 16-bit 80-type Parallel Host I/F and supports up to VGA resolution. Camera power
system is supported LDO and the voltage of operating camera is 2.8V & 1.8V. If map_hold go to low,
camera-system is operated, the initial code is set and the mode of camera module is done through I2C
by U202. C_MCLK and camera power go to Camera module and the module is on. And then C_DATA,
C_VS, C_HS and C_PCLK from the module go to U202.
Figure 24. LCD scheme