HD66787 Datasheet, PDF (134/159 Pages) Renesas Technology Corp – 528-channel, One-chip Driver with 262,144-color Display RAM and Power Supply Circuit for Low-temperature Poli-Si TFT (LTPS-TFT) Panels with Incorporat

HD66787
Preliminary
Power Supply Setting Flow
Whenever turning on the power supply, it must be done in accordance to the following procedure.
The stabilization time for the oscillation circuits, step-up circuits, and operational amplifiers depends on the
external resistors and capacitors.
Power supply (Vcc, Vci, IOVcc) ON
IOVcc ^Vci
Vcc
GND
Vcc(=RVcc) IOVcc
Vci or
Vcc(=RVcc), IOVcc, Vci Simultaneously
1ms or more
10ms or more
Oscillation Circuit
Stabilization Time
Power ON RESET
& Display OFF
Instructions for
settings before
driving
Power Supply
Power Supply
Instruction
issue (1)
40ms or more
Step-up Circuit
Stabilization Time
100ms or more
Power Supply
Instruction
issue (2)
Bits for “Display OFF”
DTE="0”, D1-0="00"
PON="0"
VCOMG="0"
Bits for Initializing
Power Supply Settings
VC2-0 bits setting
VRH3-0 bits setting
VCM4-0 bits setting
VDV4-0 bits setting
PON="0”, DK="1"
Bits for setting
Power Supply Operation Start
BT2-0="000"
DC12-10 bits setting
DC02-00 bits setting
AP2-0 bits setting
PON="1"
Bits for setting
Power Supply Operation Start
VCOMG="1"
BT2-0 bits setting
DK="0"
Operational
Amplifier
Stabilization
Time
Other mode settings
Instruction issue
Bits for “Display ON”
Normal Display ^{DTE = "1", D1-0="11"}
Display OFF
Sequence
Display OFF
Power supply
setting
Instruction (2)
Bits for setting
Power Supply Halt
SAP2-0="000"
AP2-0="000"
PON="0"
VCOMG="0"
Power Supply (Vcc, Vci, IOVcc) OFF
Vci _IOVcc
Vcc
GND
Vci
IOVcc
Vcc(=RVcc) or
Vcc(=RVcc),IOVcc, Vci Simultaneously
Display OFF Sequence
Display ON
sequence
Display ON
SAP2-0 bit setting
Bits for “Display ON”
DTE="1", D1-0="11"
Display ON Sequence
Power supply setting flow
Rev.0.22, May.23.2003, page 134 of 159