hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 12

• 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.

Signals
VLOUT2
VGH
VLOUT3
VGL
VLOUT4
VCL
VREG1OUT
Vcc
IOVcc
RVcc
GND
AGND
RGND
CGND
TEST1
TEST2
HD66789
Rev.0.12, May 09 2003, page 12 of 156
Number
of Pins
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I/O
O
I
O
I
O
I
I/O
-
-
-
-
-
-
O
I
I
Connected
to
Stabilizing
capacitor,
VGH
VLOUT2
Stabilizing
capacitor,
VGL
VLOUT3
Stabilizing
capacitor,
VCL
VLOUT4
Stabilizing
capacitor
or power
supply
Power
supply
Power
supply
Power
supply
Power
supply
Power
supply
Power
supply
Opposing
GND for
external
parts
GND
GND
Functions
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
Power supply for TFT gate drive. Connect to VLOUT2.
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
Power supply for TFT gate drive. Connect to VLOUT3.
Output the Vci1 x (-1) voltage from the step-up circuit 2.
Connect to a stabilizing capacitor. VLOUT4 = 0 ~ -3.3V
Power supply for VcomL drive. Connect to VLOUT4.
Reference voltage with amplitude between DDVDH and GND,
which is generated from the reference voltage internally
generated with amplitudes between Vci and GND.
The scale of the 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 for a logic circuit. Vcc = 2.4~3.3V
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.
Vcc power supply for RAM. Supply with the same potential as
the Vcc.
Ground for the logic side. GND = 0V
Ground for the analog side. AGND = 0V. When assembled on
COG, connect to GND on the FPC to avoid effects from the
noise.
Ground for internal RAM. RGND = 0V. When assembled on
COG, connect to GND on the FPC to avoid effects from the
noise.
GND level output. Available as an opposing GND for external
parts (capacitors, diodes).
Test pin. Fix it to the GND level.
Test pin. Fix it to the GND level.
Preliminary