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ST7565 Datasheet(PDF) 22 Page - Sitronix Technology Co., Ltd.

Part # ST7565
Description  65 x 132 Dot Matrix LCD Controller/Driver
PDF  56 Pages
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Manufacturer  SITRONIX [Sitronix Technology Co., Ltd.]
Direct Link  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7565 Datasheet(HTML) 22 Page - Sitronix Technology Co., Ltd.

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ST7565
Ver 1.0a
22/56
2002/06/24
Figure 8
VREG is the IC-internal fixed voltage supply, and its voltage at Ta = 25°C is as shown in Table 9.
Table 9
Part no.
Equipment Type
Thermal Gradient
VREG
ST7565-0A
(1) Internal Power Supply
–0.15 %/°C
–2.1V
ST7565-0B
(2) External Input
—
VRS
α
is set to 1 level of 64 possible levels by the electronic volume function depending on the data set in the 6-bit electronic
volume register. Table 10 shows the value for α depending on the electronic volume register settings.
Rb/Ra is the V5 voltage regulator internal resistor ratio, and can be set to 8 different levels through the V5 voltage regulator
internal resistor ratio set command. The (1 + Rb/Ra) ratio assumes the values shown in Table 11 depending on the 3-bit data
settings in the V5 voltage regulator internal resistor ratio register.
Table 10
D5
D4
D3
D2
D1
D0
α
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
:
:
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
63
62
61
:
:
2
1
0
()
Rb
Ra
+
1
VEV
V5 =
=
()
Rb
Ra
+
1
(1-
α
162 )
VREG
[∵VEV = (1-
α
162 )
VREG
]
Internal Ra
Internal Rb
VEV(constant voltage supply+electronic volume)
VDD
V5



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