Data Sheet

a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9341
The information contained herein is the exclusive property of ILI Technology Corp. and shall not be distributed,
reproduced, or disclosed in whole or in part without prior written permission of ILI Technology Corp.
Page 29 of 233
7.1.4. Read Cycle Sequence
The RDX signal is driven from high to low and then allowed to be pulled back to high during the read cycle. The
display module provides information to the host processor during the read cycle while the host processor reads
the display module information on the rising edge of RDX signal. When the D/CX signal is driven to low level,
then input data on the interface is interpreted as command. The D/CX signal also can be pulled high level when
the data on the interface is RAM data or command parameter.
The following figure shows the read cycle for the 8080- MCU interface.
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Note: RDX is an unsynchronized signal (It can be stopped).
InterfaceHost
ILI9341
Note: Read data is only valid when the D/CX input is pulled high. If D/CX is driven low during read then the
display information outputs will be High-Z.