ST7787 datasheet(101/217 Pages) SITRONIX

101 / 217 page

ST7787

V1.7

2008.04.18

101

9.19 Sleep Out-Command and Self-Diagnostic Functions of the Display Module

9.19.1 Register Loading Detection

Sleep Out-command (See section 10.1.12 “Sleep Out (11h)”) is a trigger for an internal function of the display module,

which indicates, if the display module loading function of factory default values from E-memory (similar device) to registers

of the display controller is working properly.

There are compared factory values of the E-memory and register values of the display controller by the display controller. If

those both values (E-memory and register values) are same, there is inverted (=increased by 1) a bit, which is defined in

command 10.1.10 “Read Display Self-Diagnostic Result (0Fh) ” (=RDDSDR) (The used bit of this command is D7). If those

both values are not same, this bit (D7) is not inverted (= increased by 1).

The flow chart for this internal function is following:

Note: There is not compared and loaded register values, which can be changed by user (00h to AFh and DAh to DDh), by

the display module.

Sleep In (10h)

Sleep Out Mode

Sleep In Mode

Sleep Out (11h)

Compares

E-memory and

Are

E-memory and

D7 inverted

Yes

RDDSDR’s D7=0

Power on sequence

HW reset

SW reset

Loads values from

E-memory to registers

ST7787 Datasheet(PDF) 101 Page - Sitronix Technology Co., Ltd.