PCF8531U2D NXP [NXP Semiconductors], PCF8531U2D Datasheet - Page 24

• Manufacturer Part Number: PCF8531U2D
• Description: 34 x 128 pixel matrix driver Single-chip LCD controller and driver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8531
Product data sheet
Fig 12. V
VOP[6:0] (programmed) [00h to 7Fh] program range LOW to HIGH.
LCD
V
LCD
programming of PCF8531
9.10 Voltage multiplier control S[1:0]
9.11 Temperature compensation
00
a
01
b
Table 10.
The PCF8531 incorporates a software configurable voltage multiplier. After reset (internal
or external), the voltage multiplier is set to 2 × V
by setting bits S[1:0] (see
Due to the temperature dependency of the viscosity of the liquid crystals, the LCD
controlling voltage V
optimum contrast.
Symbol
T
a
b
programming range
ints
02
03
04
Parameter values for the HV generator programming
LOW
05
All information provided in this document is subject to legal disclaimers.
06
Figure 13
LCD
. . .
Value
PRS = 0
27
2.94
0.03
2.94 to 6.75
Rev. 6 — 16 May 2011
should usually be increased at lower temperatures to maintain
7D
Table
7E
shows V
13).
7F
00
LCD
01
for high multiplex rates.
02
PRS = 1
27
6.75
0.03
6.75 to 10.56
03
DD2
. The voltage multiplier factors are set
04
HIGH
05
06
34 x 128 pixel matrix driver
. . .
5F
Unit
°C
V
V
V
PCF8531
6F
© NXP B.V. 2011. All rights reserved.
mgl935
7F
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