Data Sheet

a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9341
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Page 142 of 233
8.2.39. Read Display Brightness (52h)
52h RDDISBV (Read Display Brightness Value)
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 0 52h
1
st
Parameter 1 ↑ 1 XX X X X X X X X X X
2
nd
Parameter 1 ↑ 1 XX DBV[7] DBV[6] DBV[5] DBV[4] DBV[3] DBV[2] DBV[1] DBV[0] 00
Description
This command returns the brightness value of the display.
It should be checked what the relationship between this returned value and output brightness of the display. This
relationship is defined on the display module specification.
In principle the relationship is that 00h value means the lowest brightness and FFh value means the highest brightness.
Restriction
The display module is sending 2
nd
parameter value on the data lines if the MCU wants to read more than one parameter
(= more than 2 RDX cycle) on DBI Mode.
Only 2
nd
parameter is sent on DSI (The 1st parameter is not sent).
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
DBV [7:0]
Power On Sequence 8’h00h
SW Reset 8’h00h
HW Reset 8’h00h
Flow Chart