ST7586S Sitronix Technology Corporation, ST7586S Datasheet - Page 25

• Manufacturer Part Number: ST7586S
• Description: 4-level Gray Scale Dot Matrix Lcd Controller/driver
• Manufacturer: Sitronix Technology Corporation

ST7586S
Temperature Gradient Selection Circuit
SET V0 with temperature compensation (Temperature ≠ 24° C)
There are 16-line slopes in each temperature step, and customer can select one line slope of temperature compensation
coefficient for each temperature step. Each temperature step is 8° C. Please see Fig. 11 as below.
In instruction Temperature Gradient Compensation each parameter MTx, where x=0, 1, 2,…, E, F has a setting value
between 0 and 15. MTx=0 results in Mx=0V increment on V0, MTx=1 results in Mx=5mV increment,…, MTx=15 results in
Mx=15x5mV=75mV increment. Note that each MTx individually corresponds to a temperature interval; the Mx means
temperature gradient slope coefficient. The relations between Mx and V0 quantity due to temperature V0(T) are described in
the equation shown in Table 3.
Ver-1.1b
-40° C ≦ T < -32° C
-32° C ≦ T < -24° C
-24° C ≦ T < -16° C
-16° C ≦ T < -8° C
Temerature Range
16° C ≦ T < 24° C
24° C ≦ T < 32° C
32° C ≦ T < 40° C
40° C ≦ T < 48° C
48° C ≦ T < 56° C
56° C ≦ T < 64° C
64° C ≦ T < 72° C
72° C ≦ T < 80° C
80° C ≦ T < 88° C
-8° C ≦ T < 0° C
0° C ≦ T < 8° C
8° C ≦ T < 16° C
V0(T) = V0(T24) + (-8 - T) x M3 + (M4 + M5 + M6 + M7) x 8
V0(T) = V0(T24) + (0 - T) x M4 + (M5 + M6 + M7) x 8
V0(T) = V0(T24) + (8 - T) x M5 + (M6 + M7) x 8
V0(T) = V0(T24) + (16 - T) x M6 + M7 x 8
V0(T) = V0(T24) + (24 - T) x M7
V0(T) = V0(T24) - (T - 24) x M8
V0(T) = V0(T24) - (T - 32) x M9 – M8 x 8
V0(T) = V0(T24) - (T - 40) x M10 – (M9 + M8) x 8
V0(T) = V0(T24) - (T - 48) x M11 – (M10 + M9 + M 8) x 8
V0(T) = V0(T24) - (T - 56) x M12 – (M11 + M10 + M9 + M8) x 8
V0(T) = V0(T24) - (T - 64) x M13 – (M12 + M11 + M10 + M9 + M8) x 8
V0(T) = V0(T24) - (T - 72) x M14 – (M13 + M12 + M11 + M10 + M9 + M8) x 8
V0(T) = V0(T24) - (T - 80) x M15 – (M14 + M13 + M12 + M11 + M10 + M9 + M8) x 8
V0(T) = V0(T24) + (-32 - T) x M0 + (M1 + M2 + M3 + M4 + M5 + M6 + M7) x 8
V0(T) = V0(T24) + (-24 - T) x M1 + (M2 + M3 + M4 + M5 + M6 + M7) x 8
V0(T) = V0(T24) + (-16 - T) x M2 + (M3 + M4 + M5 + M6 + M7) x 8
Fig. 11
Temperature Compensation Coefficient Selection
Equation V0(T) at temperature=T° C
Table 3
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2009/12/23