hd66421 Renesas Electronics Corporation., hd66421 Datasheet - Page 6

• Manufacturer Part Number: hd66421
• Description: Ram-provided 160 Channel 4-level Grey Scale Driver For Dot Matrix Graphics Lcd
• Manufacturer: Renesas Electronics Corporation.

Pin Name
Vcc1-6, 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
SEG1 to
SEG160
COM1 to
IREFP
IREFM
GREF
COM100
Pin Description
Preliminary
Number
of Pins
160
100
12
4
5
1
2
1
1
1
1
1
1
1
1
1
1
1
8
1
1
1
I/O Connected to
I/O resister or
I/O CL1 of HD66421
I/O FLM of HD66421 Frame signal
I/O M of HD66421
I/O MPU
O OSC of Slave
O External DC/DC
O LCD
O LCD
I, Oscillator
-
-
-
I
I
I
I
I
I
-
-
-
External resistor
Power supply
Power supply
V1 to V5 of
external clock
convertor
Vcc or GND
-
MPU
MPU
MPU
MPU
VCC
GND
HD66421
HD66421
Description
Power supply to LCD driving circuit
Several levels of power to the LCD driving outputs.
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
Converts LCD driving outputs to AC
Specifies master/slave mode.
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
Vcc: +2.2V to +5.5V, GND: 0V
Master HD66421 outputs these levels to the slave
HD66421.
Reset the LSI internally when drive low.
Power supply for internal operation amplifier
Bias current for internal operational amplifier
Power supply for internal operation amplifier
6
Rev. 1.1E '99.02.10
HD66421