hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 13
hd66712u
Manufacturer Part Number
hd66712u
Description
Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66712U.pdf
(88 pages)
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HD66712U
Table 1
Signal
CL1
CL2
D
M
EXT
V1 to V5
V
OSC1/
OSC2
Vci
V5OUT2
V5OUT3
C1/C2
RESET*
TEST
376
CC
/GND
Number
1
1
1
1
1
5
2
2
1
1
1
2
1
1
Pin Functional Description (cont)
of Pins
I/O
O
O
O
O
I
—
—
—
I
—
O
O
I
I
Device
Interfaced with
Extension driver
Extension driver
Extension driver
Extension driver
—
Power supply
Power supply
Oscillation resistor
clock
—
V5 pin/ booster
capacitance
V5 pin
Booster
capacitance
—
—
Function
When EXT = high, outputs the extension driver latch
pulse.
When EXT = high, outputs the extension driver shift
clock.
When EXT = high, outputs extension driver data; data
from the 61st dot on is output.
When EXT = high, outputs the extension driver AC
signal.
When EXT = high, outputs the extension driver
control signal. When EXT = low, the signal becomes
tristate and can suppress consumption current.
Power supply for LCD drive
V
V
When crystal oscillation is performed, an external
resistor must be connected. When the pin input is an
external clock, it must be input to OSC1.
Inputs voltage to the booster to generate the liquid
crystal display drive voltage.
Vci is reference voltage and power supply for the
booster.
Vci = 1.0V to 5.0V
Voltage input to the Vci pin is boosted twice and
output. When the voltage is boosted three times, the
same capacitance as that of C1–C2 should be
connected here.
Voltage input to the Vci pin is boosted three times and
output.
External capacitance should be connected here when
using the booster.
Reset pin. Initialized to “low.”
Test pin. Should be wired to ground.
CC
CC
: +2.7V to +5.5V, GND: 0V
–V5 = 11V (max)
V
CC
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