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 176 of 233
8.3.14. Backlight Control 7 (BEh)
BEh Backlight Control 7
D/CX RDX WRX D17-8 D7 D6 D5 D4 D3 D2 D1 D0 HEX
Command 0 1 ↑ XX 1 0 1 1 1 1 1 0 BEh
Parameter 1 1 ↑ XX
PWM_
DIV[7]
PWM_
DIV[6]
PWM_
DIV[5]
PWM_
DIV[4]
PWM_
DIV[3]
PWM_
DIV[2]
PWM_
DIV[1]
PWM_
DIV[0]
0F
Description
PWM_DIV [7:0] : PWM_OUT output frequency control. This command is used to adjust the PWM waveform frequency of
PWM_OUT. The PWM frequency can be calculated by using the following equation.
f
PWM_OUT
=
255)1]0:7[PWM_DIV(
16MHz
×+
PWM_DIV [7:0]
f
PWM_OUT
8’h0
62.74 KHz
8’h1
31.38 KHz
8’h2
20.915KHz
8’h3
15.686KHz
8’h4
12.549 KHz
… …
8’hFB
249Hz
8’hFC
248Hz
8’hFD
247Hz
8’hFE
246Hz
8’hFF
245Hz
PWM_OUT
f
PWM_OUT
t
ON
t
OFF
Note: The output frequency tolerance of internal frequency divider in CABC is ±10%
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
Status Default Value
Power On Sequence PWM_DIV [7:0]=0Fh
SW Reset No change
HW Reset PWM_DIV [7:0]=0Fh