ST7565-0A ETC1 [List of Unclassifed Manufacturers], ST7565-0A Datasheet - Page 37

• Manufacturer Part Number: ST7565-0A
• Description: 65 x 132 Dot Matrix LCD Controller/Driver
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

ST7565S
(C) When External Resistors are Used (The V5 Voltage Regulator Internal Resistors Are Not Used) (2)
When the external resistor described above are used, adding
a variable resistor as well makes it possible to perform fine
adjustments on Ra’ and Rb’, to set the liquid crystal drive
voltage V
function makes it possible to control the liquid crystal power
supply voltage V
Setup example: When selecting Ta = 25°C and V
V (using R2) for an ST7565S the temperature gradient
= –0.05%/°C.
When the central value for the electronic volume register is
set at (D5, D4, D3, D2, D1, D0) = (1, 0, 0, 0, 0, 0), then α =
31 and V
R
When ΔR
When the current flowing V
Ver 0.3c
-9V=
-5V=
2
= 0 Ω, in order to make V
Ra'
Rb'
(
(
REG
V
Variable Range
Notch width
5
2
1
1
. In this case, the use of the electronic volume
5
= R
+
+
= –2.1 V so, according to equation C-1, when Δ
V
2
R3+R2
R1+R2
, in order to make V = –5 V,
5
resistor R1
resistor R2
resistor R3
R1
R3
5
[
=
=
External
External
External
∵ V
by commands to adjust the liquid
(
(
1
1
+
+
) (
) (
DD
EV
R3+R2-ΔR2
R3+R2-ΔR2
5
and V
R1+ΔR2
R1+ΔR2
= –9 V,
=
Min
–8.7 (63 levels)
1 -
1 -
(
5
1 -
is set to 5 uA,
162
162
31
31
ΔR
V
162
α
R
)
)
)
)
2
)
5
(-2.1)
(-2.1)
(
= –5 to –9
V
V
V
1 -
EV
REG
EV
(fixed voltage power supply+electronic volume)
162
α
]
Typ
–7.0 (central value)
Figure 12
Table 15
53
37/72
)
crystal display brightness.
In the range where | V
calculated by equation C-1 below based on the R
(variable resistor) and R
be subjected to fine adjustments (Δ R
With this, according to equation C-2, C-3 and C-4,
The V
electron volume function is as shown in Table 15.
V
R1 = 264kΩ
R2 = 211kΩ
R3 = 925kΩ
REG
5
voltage variable range and notch width based on the
–5.3 (0 level)
Max
5
| < | V
3
OUT
settings, where R
| the V
2
).
Units
[V]
[mV]
5
voltage can be
2002/07/22
V
1
V
and R
DD
5
2
can
2