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 36 of 233
7.1.10. Read Cycle Sequence
The read mode of interface means that the host reads register’s parameter or display data from ILI9341. The
host has to send a command (Read ID or register command) and then the following byte is transmitted in the
opposite direction. ILI9341 latches the SDA (input data) at the rising edges of SCL (serial clock), and then shifts
SDA (output data) at falling edges of SCL (serial clock). After the read status command has been sent, the SDA
line must be set to tri-state and no later than at the falling edge of SCL of the last bit. The read mode has three
types of transmitted command data (8-/24-/32-bit) according command code.
3-wire Serial Interface Protocol
TB
P
D6D7 D5 D4 D2D3 D1 D0D/C
TB
S
S
D/C
3-wire Serial Protocol (for RDID1/RDID2/RDID3/0Ah/0Bh/0Ch/0Dh/0Eh/0Fh command: 8-bit read)
D6D7 D5 D4 D2D3 D1 D0
D6D7 D5 D4 D2D3 D1 D0D/C
D6D7 D5 D4 D2D3 D1 D0
D/C
CSX
SDA
SCL
SDA
SDO
Interface I
Interface II
Command Read Data Output
3-wire Serial Protocol (for RDDID command: 24-bit read)
TB P
D6D7 D5 D4 D2D3 D1 D0D/C
TB
CSX
SDA
SS
D/C
SCL
D6D7 D5 D4 D2D3 D1 D0D/C
D22
D23
D21
D2 D1 D0
SDA
D/C
SDO
Dummy Clock Cycle
D22
D23
D21
D2 D1 D0
Interface I
Interface II
Command
Multi-byte
Read Data Output