hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 129

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

HD66789
Power Supply Setting
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.
Rev.0.12, May 09 2003, page 129 of 156
Oscillation Circuit
Stabilization Time
10ms or more
1ms or more
100ms or more
Operational
Amplifier
Stabilization
Time
40ms or more
Step-up Circuit
Stabilization Time
Vcc(=RVcc), IOVcc, Vci Simultaneously
Display ON Sequence
Power supply (Vcc, Vci, IOVcc) ON
Vcc(=RVcc)
Other mode settings
Instruction issue
Instructions for
settings before
driving
Power Supply
Power ON RESET
Power Supply
Instruction
issue (1)
& Display OFF
Power Supply
Instruction
issue (2)
Display ON
Vcc
Display ON
sequence
IOVcc Vci
IOVcc
Vci or
Bits for “Display OFF”
DTE="0”, D1-0="00"
GON="0"
PON="0"
VCOMG="0"
VC2-0 bits setting
VRH3-0 bits setting
VCM4-0 bits setting
VDV4-0 bits setting
PON="0”, DK="1"
SAP2-0 bit setting
Bits for Initializing
Power Supply Settings
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
Bits for “Display ON”
GND
DTE="1", D1-0="11"
GON="1"
VCOMG="1"
BT2-0 bits setting
DK="0"
Power Supply (Vcc, Vci, IOVcc) OFF
Power supply
setting
Instruction (2)
Normal Display
Vci
Vcc(=RVcc),IOVcc, Vci Simultaneously
Display OFF
Display OFF
Sequence
Display OFF Sequence
IOVcc
Vci
IOVcc
Bits for “Display ON”
DTE = "1", D1-0="11"
GON = "1"
Vcc(=RVcc) or
Bits for setting
Power Supply Halt
SAP2-0="000"
AP2-0="000"
PON="0"
VCOMG="0"
Vcc
GND
Preliminary