pcf8833 NXP Semiconductors, pcf8833 Datasheet - Page 52

• Manufacturer Part Number: pcf8833
• Description: Stn Rgb - 132 X 132 X 3 Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6.2.39
The Set multiplication factor (SETMUL) command sets the multiplication factor of voltage multiplier 1. A detailed
explanation of the LCD voltage supply architecture is given in Section 7.8.
The different multiplication factor settings for voltage multiplier 1 are given in Table 63.
Table 62 Set multiplication factor register bits; note 1
Note
1. X = don’t care.
Table 63 Multiplication factor settings voltage multiplier
Note
1. Reset state.
6.2.40
The Set TCVOP slopes A, B, C and D (TCVOPAB and TCVOPCD) command splits the temperature range into 4 parts
and can be programmed by using the following commands.
Due to the temperature dependency of the liquid crystals viscosity, the LCD controlling voltage V
adjusted at different temperatures to maintain optimum contrast.
There are four equally spaced temperature regions. For each temperature region a different temperature coefficient can
be selected. Each coefficient can be selected from a choice of eight different slopes, or multiplication factors
(see Table 66) by setting TCVOPAB and TCVOPCD. The controlled V
(parameter b in Table 47). Slopes SLA, SLB, SLC and SLD are overwritten by OTP values if these are set.
Table 64 Set TCVOP slopes A and B register bits; note 1
Note
1. X = don’t care.
2003 Feb 14
STN RGB - 132
D/C
D/C
S1
0
1
0
0
1
1
0
1
S
S
ET MULTIPLICATION FACTOR
ET
TCVOP
D7
S0
X
X
1
0
1
0
1
7
1
SLOPES
2
3
4
5
SLB
D6
multiplication
multiplication
multiplication
multiplication; note 1
X
1
6
1
A, B, C
132
2
AND
SLB
3 driver
D5
X
0
5
0
D
1
SLB
D4
X
0
4
0
0
MULTIPLICATION FACTOR
52
D3
X
X
0
3
0
LCD
will not be changed linearly, but in 40 mV steps
SLA
D2
X
0
2
0
2
SLA
D1
S1
1
1
1
1
Objective specification
LCD
SLA
D0
S0
0
0
1
might have to be
PCF8833
0
DEFAULT
DEFAULT
C2H
C3H
03H
34H