PCA8538UG(2014) 查看數據表（PDF） - NXP Semiconductors.
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PCA8538UG Datasheet PDF : 107 Pages
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NXP Semiconductors
PCA8538
Automotive 102 x 9 Chip-On-Glass LCD segment driver
Table 34. Temperature coefficients
TSA[2:0] to TSF[2:0] value Slope factor (mV/C)
000[2]
0
001
6
010
12
011
24
100
60
101
+6
110
+12
111
+24
Temperature coefficients
SA to SF[1]
0.000
0.125
0.250
0.500
1.250
+0.125
+0.250
+0.500
[1] The relationship between the temperature coefficients SA to SF and the slope factor is derived from the
following equation: Sn = L----S----B---0--o-.-6-f--2--V-7---[5--8---:--0--C-]----m-----V---- slope factor (mV/C , where LSB of V[8:0] 30 mV.
[2] Default value.
The binary value of the temperature compensated voltage VT[8:0] is calculated according
to Table 35.
Table 35. Calculation of the temperature compensated value VT
Temperature Digital temperature:
(C)
TD[7:0]
Binary value of the temperature compensated
voltage: VT[8:0]
T –40 C
TD7:0 = 0
–96 – T2 SC – T2 – T1 SB – T1 SA
–40 C T T1 0 TD7:0 T1
–96 – T2 SC – T2 – T1 SB – T1 – TD7:0 SA
T1 T T2
T1 TD7:0 T2
–96 – T2 SC – T2 – TD7:0 SB
T2 T 20 C T2 TD7:0 96
–96 – TD7:0 SC
20 C T T3 96 TD7:0 T3
TD7:0 – 96 SD
T3 T T4
T3 TD7:0 T4
T3 – 96 SD + TD7:0 – T3 SE
T4 T 105 C T4 TD7:0 231
T3 – 96 SD + T4 – T3 SE + TD7:0 – T4 SF
8.10.5 LCD voltage selector
The LCD voltage selector co-ordinates the multiplexing of the LCD in accordance with the
selected LCD drive configuration. The operation of the voltage selector is controlled by the
Set-bias-mode command (see Table 16 on page 15) and the Set-MUX-mode command
(see Table 20 on page 18).
PCA8538
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 26 September 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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