HD66773R Datasheet, PDF (99/133 Pages) Renesas Technology Corp – 262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels

HD66773R
Power Supply Setting Flow
When turning on the power supply, follow the sequence below.
The stabilization time for the oscillation circuits, step-up circuits, and operation amplifiers may vary
depending on the external resistors and capacitors.
Power ON sequence
Power ON
(Vcc On)
1ms
10ms or more
Time for
oscillation circuit
to stabilize
Power-on reset
& Display OFF
Display-OFF bit
DTE = "0", D1-0 = "00"
GON = "0", PON = "0",
VcomG = "0"
Issue Instruction (1)
for Power setting
Power-initialization setting bit
Set VC2-0, VRH3-0, CAD,
VRL3-0, VCM4-0, VDV4-0
40ms or more
Time for
step-up
circuits 1,2
to stabilize
40ms or mor
Time for
step-up
circuit 4
to stabilize
Power-operation start
Issue Instruction (2) ^{setting bit}
for Power setting ^{Set BT2-0, DC2-0, AP2-0}
Power On
Sequence
Issue Instruction (3)
for Power setting
Step-up circuit 4
operation start setting bit
Set VCOMG = "1"
(Not required if VcomL = GND)
Wait
100ms
or more
Isfsorue Instruction (4)
for Power setting
Step-up circuit 3
operation start setting bit
Set PON = "1"
Power OFF sequence
Normal
Display
Display-ON bit
DTE = "1", D1-0 = "11"
GON = "1"
Display OFF
sequence
Display OFF
Display-OFF bit
DTE = "0", D1-0 = "00"
GON = "0"
Issue Instruction (1)
for Power setting
Step-up1 halt setting bit
BT2-0 ="110"
Step-up3,4 halt setting bit Power Off
Issue Instruction (2) _{PON="0", VCOMG="0"}
for Power setting
Sequence
Step-up2, amp halt setting bit
Issue Instruction (3) _{BT2-0="000", AP2-0="000"}
for Power setting
100ms or more
Time for
step-up circuits
& ope-amps
to stabilize
Issue Instruction for
other mode settings
Display-ON
sequence
Display ON
Display-ON bit
DTE = "1", D1-0 = "11"
GON = "1"
Power OFF
(Vcc OFF)
Rev.1.10, Jun.21.2003, page 99 of 133