Data Sheet

a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9341
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Page 205 of 233
11.2. Functionality Detection
Sleep Out-command (Command “Sleep Out (11h)”) is a trigger for an internal function of the display module,
which indicates, if the display module is still running and meets functionality requirements.
The internal function (= the display controller) is comparing, if the display module is still meeting functionality
requirements (e.g. booster voltage levels, timings, etc.) If functionality requirement is met, there is an inverted (=
increased by 1) bit, which defined in command “Read Display Self- Diagnostic Result (0Fh)” (= RDDSDR) (The
used bit of this command is D6). If functionality requirement is not same, this bit (D6) is not inverted (= increased
by 1). The flow chart for this internal function is shown as below.
The flow chart for this internal function is following:
Power on sequence
HW reset
SW reset
RDDSDR(0Fh)'s D6 = '0'
Sleep IN
mode
Sleep OUT
mode
Sleep IN (10h)
Sleep OUT (11h)
Check timings, valtage levels,
and other functionalities
Is the required
functionality present?
D6 inverted
YES
NO
Note 1: There is needed 120msec after Sleep Out -command, when there is changing from Sleep In –mode to
Sleep Out -mode, before there is possible to check if User’s functionality requirements are met and a
value of RDDSDR’s D6 is valid. Otherwise, there is 5msec delay for D6’s value, when Sleep
Out –command is sent in Sleep Out -mode.