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 143 of 233
8.2.40. Write CTRL Display (53h)
53h WRCTRLD (Write Control Display)
D/CX RDX WRX D17-8 D7 D6 D5 D4 D3 D2 D1 D0 HEX
Command 0 1 ↑ XX 0 1 0 1 0 0 1 1 53h
Parameter 1 1 ↑ XX 0 0 BCTRL 0 DD BL 0 0 00
Description
This command is used to control display brightness.
BCTRL : Brightness Control Block On/Off, This bit is always used to switch brightness for display.
0 = Off (Brightness registers are 00h, DBV[7..0])
1 = On (Brightness registers are active, according to the other parameters.)
DD : Display Dimming, only for manual brightness setting
DD = 0: Display Dimming is off
DD = 1: Display Dimming is on
BL : Backlight Control On/Off
0 = Off (Completely turn off backlight circuit. Control lines must be low. )
1 = On
Dimming function is adapted to the brightness registers for display when bit BCTRL is changed at DD=1, e.g. BCTRL: 0 
1 or 1  0.
When BL bit change from “On” to “Off”, backlight is turned off without gradual dimming, even if dimming-on (DD=1) are
selected.
Restriction
None
Register
Availability
Status Availability
Normal Mode On, Idle Mode Off, Sleep Out Yes
Normal Mode On, Idle Mode On, Sleep Out Yes
Partial Mode On, Idle Mode Off, Sleep Out Yes
Partial Mode On, Idle Mode On, Sleep Out Yes
Sleep In Yes
Default
Default Value
Status
BCTRL DD BL
Power On Sequence 1’b0 1’b0 1’b0
SW Reset 1’b0 1’b0 1’b0
HW Reset 1’b0 1’b0 1’b0