Specifications

66 Issue Date: 2004/11/05 │ CONFIDENTIAL
CL765 │ Camera Application Processor
Datasheet │ Doc. #: CLQP-DS-743
4.13.2. 80-Type LCD Interface
The CL765 can control two LCD’s, one for main-LCD and the other for sub-LCD.
Figure 4-22 shows the generic connections between the CL765 and LCD’s.
Sub LCD
LS_CS_N
L_DA[17:0]
L_WR_N
L_RD_N
L_ADS
L_CS_N
Main LCD
CL765
Figure 4-20. The Generic Interconnection to LCD Modules
The pins used in the interconnection are:
L_DA[17:0]: 18-bit data bus for LCD’s register and GRAM data read/write
L_RD_N: read strobe to LCD’s, active-low
L_WR_N: write strobe to LCD’s, active-low
L_ADS: address and data selection signal. During bus cycle, it remains high
for data and low to address.
L_CS_N: chip select for main-LCD, active-low
LS_CS_N: chip select for sub-LCD, active-low
For 80-Type LCDs, the CL765 supports various LCDs such as 260K, 65K, and 4K
and various buses such as 16bit, 18bit, 9+9, and 8+8. The CL765 sets LCD
Windows every Frame Preview and writes GRAM.
The CL765 stores the scaled Data from Camera to the Video Buffer. Once 1frame
of data has been stored in the Video Buffer, the rest of the Data gets updated fast
into LCD GRAM using similar method such as Burst mode in LCD. The filling
method is different for various types of LCD Driver IC but following is an
example.