HD66787 Datasheet, PDF (13/159 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
Signals
VREG1OUT
Vcc
IOVcc
RVcc
GND
AGND
RGND
TEST1
TEST2
V0P, V31P
V0N, V31N
VGS
VTESTS
TS0~TS7
TESTA1
TESTA2
TESTA4
VMONI
IOVccDUM1~4
Number
of Pins
1
1
1
1
1
1
1
1
1
2
2
1
1
8
1
1
1
1
4
I/O
I/O
-
-
-
-
-
-
I
I
I or O
I or O
I
I/O
O
I/O
I/O
I/O
O
O
Connected Functions
to
Stabilizing
capacitor
or power
supply
Reference voltage with amplitude between DDVDH and GND,
which is generated from the reference voltage internally
generated with amplitude between Vci and GND.
The scale of output voltage can be set with VRH bits.
VREG1OUT becomes (1) a source driver grayscale reference
voltage VDH, (2) a VcomH level reference voltage, or (3) a
Vcom amplitude reference voltage. Connect to a stabilizing
capacitor.
VREG1OUT = 3.0 ~ (DDVDH – 0.5)V
Power
supply
Power supply for a logic circuit. Vcc = 2.4 ~ 3.3V
Power
supply
Power supply for interface pins. IOVcc = 1.8 ~ 3.3V. IOVcc
must be turned on with the same voltage as the internal logic
voltage Vcc. When it is assembled on COG, connect to Vcc on
the FPC to avoid effects from the noise when IOVcc is used.
Power
supply
Vcc power supply for RAM. Supply with the same potential as
the Vcc.
Power
supply
Ground for the logic side. GND = 0V
Power
supply
Ground for the analog side. AGND = 0V. When assembled on
COG, connect to GND on the FPC to avoid effects from the
noise.
Power
supply
Ground for internal RAM. RGND = 0V. When assembled on
COG, connect to GND on the FPC to avoid effects from the
noise.
GND
Test pin. Fix it to the GND level.
GND
Test pin. Fix it to the GND level.
Stabilizing
capacitor
Output from internal positive polarity operational amplifier when
the operational amplifier is ON (SAP2-0 = “001”, “010”, “011”,
“100”, and “101”). Stabilize by connecting to a capacitor.
Stabilizing
capacitor
Output from internal negative polarity operational amplifier
when the operational amplifier is ON (SAP2-0 = “001”, “010”,
“011”, “100”, and “101”). Stabilize by connecting to a capacitor.
GND or
external
resistor
Reference level for grayscale voltage generation circuit.
Connect to an external resistor when source driver is used to
adjust grayscale levels for each panel.
open
Test pin. Leave open.
open
Test pin. Leave open.
open
Test pin for VcomH. Leave open.
open
Test pin for VcomL. Leave open.
open
Test pin for VcomL. Leave open or connect to a stabilizing
capacitor depending on the display quality.
open
Test pin. Leave open.
Input pin
Internal IOVcc level. When neighboring input pins are fixed to
the IOVcc side, short-circuit them.
Rev.0.22, May.23.2003, page 13 of 159