HD66787 Datasheet, PDF (12/159 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
Signals
C12+, C12-
C21+, C21-
C22+, C22-
OSC1, OSC2
FLM
Vci
VciLVL
REGP
VciOUT
Vci1
VLOUT1
DDVDH
VLOUT2
VGH
VLOUT3
VGL
VLOUT4
VCL
Preliminary
Number
of Pins
6
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I/O
-
I or O
O
I
I
I/O
I
I
O
I
O
I
O
I
O
I
Connected Functions
to
Step-up
capacitor
Step-up capacitor connection pins for step-up circuit 2.
Capacitor connection will be necessary depending on the step-
up scale. When the internal step-up circuit is not used, leave
open.
Resistor for Connect to an external resistor for R-C oscillation. When
the
supplying clock signals externally, it must be supplied through
oscillator OSC1 and leave OSC2 open.
MPU or
open
Frame head pulse with amplitude between GND and Vcc.
Use when writing data to RAM in synchronization with FLM.
When FLM is not used, leave open.
Power
supply
Power supply for analogue circuits.
In this case, power supply for the VciOUT amplifier. Connect
to an external power supply of 2.5~3.3V.
Power
supply
Generates a reference voltage (VciOUT, REGP) in accordance
to the ratio set with VC2~0 registers.
Connect to the same power supply as the Vci, which has
separate wiring from the VciLVL on the FPC.
Test pin
Test pin for VREG1OUT. Leave open.
Stabilizing
capacitor,
Vci1
Internal reference voltage with amplitude between Vci and
GND. Set with VC bit.
VciOUT
A reference voltage for the step-up circuit 1.
Connect to an external power supply of 2.75V or less when the
internal reference voltage is not used.
Stabilizing
capacitor,
DDVDH
Output twice stepped-up Vci1 voltage from the step-up circuit
1. Connect to a stabilizing capacitor. VLOUT1 = 4.0~5.5V
VLOUT1
Power supply for source driver liquid crystal output portion. A
reference voltage for the step-up circuit 2.
Stabilizing
capacitor,
VGH
Output stepped-up DDVDH voltage, which is stepped up to the
level Vci1 x 4~6 from the step-up circuit 2. The step-up scale
is determined with BT bits. Connect to a stabilizing capacitor.
VLOUT2 = max 16.5V
VLOUT2 Power supply for TFT gate drive. Connect to VLOUT2.
Stabilizing
capacitor,
VGL
Output stepped-up DDVDH voltage, which is stepped up to the
level Vci1 x (- 3) ~ (-5) from the step-up circuit 2. The step-up
scale is determined with BT bits. Connect to a stabilizing
capacitor. VLOUT2 = min -16.5V
VLOUT3 A power supply for TFT gate drive. Connect to VLOUT3.
Stabilizing
capacitor,
VCL
Output the Vci1 x (-1) voltage from the step-up circuit 2.
Connect to a stabilizing capacitor. VLOUT4 = 0 ~ -3.3V
VLOUT4 Power supply for VcomL drive. Connect to VLOUT4.
Rev.0.22, May.23.2003, page 12 of 159