ST7789V2 datasheet(138/319 Pages) SITRONIX

138 / 319 page

ST7789V2

Version 1.0

Page 138 of 319

2016/11

Sitronix Confidential

The information contained herein is the exclusive property of Sitronix and shall not be distributed, reproduced, or

disclosed in whole or in part without prior written permission of Sitronix.

8.16 Power ON/OFF Sequence

VDDI and VDD can be applied in any order.

VDD and VDDI can be power down in any order.

During power off, if LCD is in the Sleep Out mode, VDD and VDDI must be powered down minimum 120msec

after RESX has been released.

During power off, if LCD is in the Sleep In mode, VDDI or VDD can be powered down minimum 0msec after

RESX has been released.

CSX can be applied at any timing or can be permanently grounded. RESX has priority over CSX.

Note 1: There will be no damage to the display module if the power sequences are not met.

Note 2: There will be no abnormal visible effects on the display panel during the Power On/Off Sequences.

Note 3: There will be no abnormal visible effects on the display between end of Power On Sequence and before receiving Sleep Out

command. Also between receiving Sleep In command and Power Off Sequence.

Note 4: If RESX line is not held stable by host during Power On Sequence as defined in the sequence below, then it will be necessary to

apply a Hardware Reset (RESX) after Host Power On Sequence is complete to ensure correct operation. Otherwise function is not

guaranteed.

The power on/off sequence is illustrated below

Timing when the latter signal rises up to 90% of its typical value.

e.g. When VDD comes later, this timing is defined at the cross

point of 90% of 2.75V, not 90% of 2.6V.

Timing when the latter signal falls up to 90% of its typical value.

e.g. When VDD comes later, this timing is defined at the cross

point of 90% of 2.75V, not 90% of 2.6V.

H or L

TrPW-CSX = +/- no limit

TfPW-CSX = +/- no limit

30%

TrPW-RESX = + no limit

TfPW-RESX1 = min

120ms

TfPW-RESX2 = min 0ms

TfPW-RESx1 is applied to RESX falling in the Sleep Out Mode.

TfPW-RESx2 is applied to RESX falling in the Sleep In Mode.

VDD

VDDI

CSX

RESX

(Power down in

sleep-out mode)

RESX

(Power down in

sleep-in mode)

TrPW = +/- no limit

TfPW = +/- no limit

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