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STE2004 Datasheet(PDF) 9 Page - STMicroelectronics

Part # STE2004
Description  102 X 65 SINGLE CHIP LCD CONTROLLER / DRIVER
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STE2004 Datasheet(HTML) 9 Page - STMicroelectronics

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STE2004
3.7 Temperature Coefficients
As the viscosity, and therefore the contrast, of the LCD are subject to change with temperature, there's
the need to vary the LCD Voltage with temperature. STE2004 provides the possibility to change the VLCD
in a linear fashion against temperature with eight different Temperature Coefficient selectable through T2,
T1 and T0 bits. Only four of them are available through basic instruction set.
Table 5.
Table 6.
Figure 7.
Finally, the VLCD voltage at a given (T) temperature can be calculated as:
VLCD(T) = VLCDo · [1 + (T-To) · TC]
NAME
TC1
TC0
Value
Unit
TC0
0
0
-0.0· 10-3
1/ °C
TC2
0
1
-0.7 · 10-3
1/°C
TC3
1
0
-1.05· 10-3
1/°C
TC6
1
1
-2.1 · 10-3
1/°C
NAME
T2
T1
T0
Value
Unit
TC0
0
0
0
-0.0· 10-3
1/ °C
TC1
0
0
1
-0.35 · 10-3
1/°C
TC2
0
1
0
-0.7 · 10-3
1/°C
TC3
0
1
1
-1.05· 10-3
1/°C
TC4
1
0
0
-1.4 · 10-3
1/°C
TC5
1
0
1
-1.75· 10-3
1/°C
TC6
1
1
0
-2.1 · 10-3
1/°C
TC7
1
1
1
-2.3· 10-3
1/°C
00h 01h 02h 03h 04h 05h ….
7Fh 00h 01h 02h
7Ch 7Dh 7Eh
03h 04h
7Dh 7Eh 7Fh
05h ….
7Ch
A1
A1
B
A0 + B
PRS = [0;0]
PRS = [0;1]
VO
VLCD
00h 01h 02h 03h 04h
7Dh 7Eh 7Fh
05h
7Ch
PRS = [1;0]
….
A2


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