ST7533 Sitronix Technology, ST7533 Datasheet - Page 23

• Manufacturer Part Number: ST7533
• Description: 33 x 96 Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7533
V
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 V
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 V
V
Figures 9, 10 show V
volume resister for each temperature grade model.
Ver 1.0
REG
5
voltage regulator internal resistance ratio register value and (1 + Rb/Ra) ratio (Reference value)
is the IC-internal fixed voltage supply, and its voltage at Ta = 25°C is as shown in Table 9.
5
5
voltage regulator internal resistor ratio, and can be set to 8 different levels through the V
voltage regulator internal resistor ratio register.
Part no.
ST7533
5
voltage measured by values of the internal resistance ratio resistor for V
Internal Power Supply
Equipment Type
D2 D1 D0
D5
0
0
0
1
1
1
0
0
0
0
1
1
1
1
Register
0
0
1
1
0
0
1
1
D4
0
0
0
1
1
1
0
1
0
1
0
1
0
1
D3
0
0
0
1
1
1
Table 9
Table 10
Table 11
:
:
23/60
D2
0
0
0
1
1
1
(1) –0.15 %/°C
D1
0
0
1
0
1
1
ST7533
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
D0
0
1
0
1
0
1
Thermal Gradient
–0.15 %/°C
63
62
61
α
2
1
0
:
:
5
voltage adjustment and electric
–2.1V
V
REG
5
voltage regulator
2003/07/21