ST7713 datasheet(93/159 Pages) SITRONIX

93 / 159 page

ST7713

Ver 1.6

2008-05

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

9.20.1 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 EEPROM (or similar device) to

registers of the display controller is working properly.

There are compared factory values of the EEPROM and register values of the display controller by the display controller. If

those both values (EEPROM 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 EEPROM and

Are EEPROM and

D7 inverted

Yes

RDDSDR’s D7=0

Power on sequence

HW reset

SW reset

Loads values from

EEPROM to registers

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