PCF8531U/2DA/1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8531U/2DA/1' PDF : 51 Pages View PDF
NXP Semiconductors
PCF8531
34 x 128 pixel matrix driver
Table 10. Parameter values for the HV generator programming
Symbol
Value
Unit
PRS = 0
PRS = 1
Tints
27
27
°C
a
2.94
6.75
V
b
0.03
0.03
V
programming range 2.94 to 6.75
6.75 to 10.56
V
VLCD
b
a
00 01 02 03 04 05 06 . . . 7D 7E 7F 00 01 02 03 04 05 06 . . . 5F 6F 7F
LOW
HIGH
mgl935
VOP[6:0] (programmed) [00h to 7Fh] program range LOW to HIGH.
Fig 12. VLCD programming of PCF8531
9.10 Voltage multiplier control S[1:0]
The PCF8531 incorporates a software configurable voltage multiplier. After reset (internal
or external), the voltage multiplier is set to 2 × VDD2. The voltage multiplier factors are set
by setting bits S[1:0] (see Table 13).
9.11 Temperature compensation
Due to the temperature dependency of the viscosity of the liquid crystals, the LCD
controlling voltage VLCD should usually be increased at lower temperatures to maintain
optimum contrast. Figure 13 shows VLCD for high multiplex rates.
PCF8531
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 16 May 2011
© NXP B.V. 2011. All rights reserved.
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