hd66420 Renesas Electronics Corporation., hd66420 Datasheet - Page 4

• Manufacturer Part Number: hd66420
• Description: Ram-provided 160 Channel 4-level Grey Scale Driver For Dot Matrix Graphics Lcd
• Manufacturer: Renesas Electronics Corporation.

HD66420
Pin Description
Pin Name
V
GND1–6
VLCD1–4
V1O, V2O,
V3O, V4O,
V5O
OSC
OSC1,
OSC2
CO
DCON
CL1
FLM
M
M/S
RES
CS
RS
WR
RD
DB7 to DB0 8
SEG1 to
SEG160
COM1 to
COM80
IREFP
IREFM
GREF
4
CC
1–6,
Number of
Pins
12
4
5
1
2
1
1
1
1
1
1
1
1
1
1
1
160
80
1
1
1
I/O
—
—
—
I
I/O
O
O
I/O
I/O
I/O
I
I
I
I
I
I
I/O
O
O
—
—
—
Connected to
Power supply
Power supply
V1 to V5 of
HD66420
Oscillator
resister or
external clock
OSC of Slave
HD66420
External DC/DC
convertor
CL1 of
HD66420
FLM of
HD66420
M of HD66420
V
—
MPU
MPU
MPU
MPU
MPU
LCD
LCD
V
External resistor Bias current for internal operational amplifier
GND
CC
CC
or GND
Description
V
Power supply to LCD driving circuit
Several levels of power to the LCD driving outputs.
Master HD66420 outputs these levels to the slave
HD66420.
Must be connected to external resister when using R-C
oscillation. When using an external clock, it must be
input to the OSC terminal.
Clock output
Controls on/off switch of external DC/DC convertor
Line clock
Frame signal
Converts LCD driving outputs to AC
Specifies master/slave mode.
Reset the LSI internally when drive low.
Select the LSI, specifically internal registers (index and
data registers) when driven low.
Select one of the internal registers; select the index
register when driven low and data registers when driven
low.
Inputs write strobe; allows a write access when driven
low.
Inputs read strobe; allows a read access when driven
low.
8-bits three-state bidirectional data bus; transfer data
between the HD66420 and MPU through this bus.
Output column drive signals
Output row drive signals
Power supply for internal operation amplifier
Power supply for internal operation amplifier
CC
: +2.2V to +5.5V, GND: 0V