HD66787 Datasheet, PDF (11/159 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
SOUT14,13,
12,11
SOUT24,23,
22,21
Number I/O
of Pins
8
O
Vcom1, Vcom2 2
O
VcomR
1
I
VcomH
VcomL
1
O
1
O
C11+, C11-
2
-
Preliminary
Connected Functions
to
LCD
Level-shift and then output display clocks.
Output pins for SOUT14-11 are arranged on either left or right
side of the chip and pins for SOUT24-21 are arranged on the
other side of the chip. The kinds of output signals can be
selected as shown in the following table with LSEL22-20 and
LSEL12-10 bits and output from both or either one side of
SOUT14-11 and SOUT 24-21 pins. If signals are output from
either one side, halt the operation of unused circuits.
When signals are output from SOUT14-11, SOUT 24-21 pins,
6 different kind of 8 level-shift signals are output at maximum.
The amplitude of level-shift signal is between VGH and VGL.
Pin settings
Level shift signal
LSEL
12
LSEL
22
GND
LSEL
11
LSEL
21
GND
LSEL
10
LSEL
20
GND
SOUT
11
SOUT
21
FLM
SOUT
12
SOUT
22
SFTCLK
SOUT
13
SOUT
23
CL1
SOUT
14
SOUT
24
CL1B
GND GND IOVcc
FLM
SFTCLK CL1
DISPTMG
GND IOVcc GND
FLM
SFTCLK M
CL1B
GND IOVcc IOVcc
FLM
SFTCLK M
DISPTMG
IOVcc GND GND
FLM
DISPTMG CL1
CL1B
IOVcc GND IOVcc
Setting disabled
IOVcc IOVcc GND
Setting disabled
IOVcc IOVcc IOVcc
Halt
(VGL)
Halt
(VGL)
Halt
(VGL)
Halt
(VGL)
TFT
common
electrode
Variable
resistor or
open
Stabilizing
capacitor
Stabilizing
capacitor
or open
Step-up
capacitor
Power supply for TFT common electrode.
When Vcom AC drive is not selected, output the same level of
voltage as VcomL level. When Vcom AC drive is selected,
output the voltage with the amplitude between VcomH and
VcomL. The AC cycle can be set with M signal.
Connect to the TFT common electrode.
Reference voltage for VcomH.
When adjusting VcomH externally, VcomH internal adjusting
circuit must be halted by register setting and place a variable
resistor between VREG1OUT and GND to make an
adjustment. Otherwise, leave open and adjust VcomH by
internal-register setting.
High level of Vcom during Vcom AC drive. Connect to a
stabilizing capacitor.
Vcom voltage when Vcom AC drive is not selected.
Low level of Vcom during Vcom AC drive. Voltage can be
adjusted with internal registers. Connect to a stabilizing
capacitor. When VCOMG bit is set to LOW, a stabilizing
capacitor is not necessary because VcomL output is halted.
Step-up capacitor connection pins for step-up circuit 1. When
the internal step-up circuit is not used, leave open.
Rev.0.22, May.23.2003, page 11 of 159