Specifications

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4.2.1. LCD Access Port
LCD Access Port bypasses 1) the CL765’s any bypass mode and 2) LCD lock
status in camera mode for Data (16 bits) and control signals (CS, WR, RD). LCD
access port has Port 0 and Port 1.
Port 0: When using A0 and ADS connections together, it bypasses write of
LCD command and command parameters for most vendors LCD.
Port 1: When using A0 and ADS connections together, it writes LCD GRAM
data.
If A0 and ADS connections are not used together, then both Ports can be used
identically. In this case, ADS pin must be connected to other Address lines except
A1 and A0.
Access
Port
A1 A0 M_CS_N M_RD_N M_WR_N M_ADS Operation
LCD
Access
Port0
0 0 0 1 0 0
Write LCD Command or
Parameters.
LCD
Access
Port1
0 1 0 1 0 1
GRAM data write (Some
vendor’s LCD only writes
Command parameters.)
Table 4-1. Usage of LCD Access Port (Connecting both A0 and ADS Situation)
Access
Port
A1 A0 M_CS_N M_RD_N M_WR_N M_ADS Operation
LCD
Access
Port0
0 X 0 1 0 0
Write LCD Command or
Parameters.
LCD
Access
Port1
0 X 0 1 0 1
GRAM data write (Some
vendor’s LCD only writes
Command parameters.)
Table 4-2. Usage of LCD Access Port (Not Connecting A0 and ADS)