tl0324s Newhaven Display International, Inc, tl0324s Datasheet - Page 20
![no-image](/images/no-image-200.jpg)
tl0324s
Manufacturer Part Number
tl0324s
Description
65com / 132seg Driver & Controller For Stn Lcd
Manufacturer
Newhaven Display International, Inc
Datasheet
1.TL0324S.pdf
(68 pages)
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b. Voltage regulator circuits
The function of the internal voltage regulator circuits is to determine liquid crystal operating voltage, V0, by
the adjusting resistors, Ra and Rb, within the range of |V0| < |
Because
necessary to be applied internally or externally.
For the equation 1, we determine V0 by Ra, Rb and V
by INTRS pin.
The voltage of electronic volume, V
parameter α is the value selected by instruction, "Set reference voltage register", within the range 0 to 63.
Refer to table 5-8.
VREF voltage at Ta =25°C is show in table 5-7.
Table 5-7. VREF voltage at Ta =25°C
Table 5-8. Electronic contrast control register (Reference Voltage Parameter: α, 64step)
TOMATO LSI Inc.
SV5
0
0
1
1
1
:
:
:
:
TL0324S
V
OUT
SV4
0
0
0
1
1
:
:
:
:
is the operating voltage of operational-amplifier circuits as shown in figure 5-13, it is
SV3
REF
0
0
0
1
1
:
:
:
:
H
L
V
SV2
EV
V0 = ( 1 +
0
0
0
1
1
:
:
:
:
= ( 1 -
EV,
is determined by equation 2, where the reference voltage
SV1
0
0
0
1
1
:
:
:
:
( 63-α )
Rb
Ra
Temp. coefficient
162
External input
-0.05% / °C
SV0
) x V
0
1
0
0
1
:
:
:
:
) x VREF [V] ------ (Equation 2)
20
65COM / 132SEG DRIVER & CONTROLLER FOR STN LCD
EV
EV
. Ra and Rb are connected internally or externally
Reference Voltage
[V] ------ (Equation 1)
Parameter ( α)
32 (default)
V
OUT
62
63
0
1
|.
:
:
:
:
V
VEXT
REF
Maximum
2.1
Minimum
[V]
V0
:
:
:
:
:
:
:
:
:
:
:
Contrast
High
Low
:
:
:
:
:
:
:
:
:
:
:
Ver 0.1
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