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參數(shù)資料
| 型號： | PCF88132DA |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | (67 + 1) x 102 pixels matrix LCD driver |
| 中文描述： | （67 1）× 102像素矩陣LCD驅(qū)動器 |
| 文件頁數(shù)： | 36/72頁 |
| 文件大?。?/td> | 446K |
| 代理商： | PCF88132DA |
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2004 Mar 05
36
Philips Semiconductors
Product specification
(67 + 1)
×
102 pixels matrix LCD driver
PCF8813
11.11 Set HV generator stages
The PCF8813 incorporates a software-configurable
voltage multiplier. After reset (RES) the voltage multiplier
is set to 2
×
V
DD2
. Other voltage multiplier factors are set
via the set HVgen stages command bits S[1:0].
11.12 Bias system
The bias voltage levels are set in the ratio of
R - R - nR - R - R giving a 1/(n + 4) bias system. Different
multiplex rates require different n factors. This is
programmed by BS[2:0] (see Table 15).
For multiplex rates of 1 : 68 the optimum bias value n is
given by:
resulting in
1
/
9
bias.
Changing the bias system from the optimum value will
have a consequence for the contrast and viewing angle.
One reason to depart from the optimum would be to
reduce the required operating voltage. A compromise
between contrast and operating voltage must be found for
any particular application.
Table 15
Bias system programming
Table 16
LCD bias voltage
Notes
1.
Operation of bias level V4 is given for
V4 > V
SS
+ 0.9 V.Forhighermultiplex rates,V
LCD
has
to be selected accordingly.
Formultiplex ratesequaltoorlowerthan1 : 24(n = 2)
operation of the bias level V5 is limited to voltages
V5 < V
DD2,3
1.1 V. V
LCD
has to be selected
accordingly.
2.
The operating voltage can be set by software through the
interface. The binary number V
OP
representing the
operating voltage can be set according to the following
formula:
Where:
V
OP
is an 8-bit unsigned number used internally for
generation of the LCD supply voltage V
LCD
V
CAL
is a 5-bit twos complement number set by the
module maker; see Table 17
V
PR
is an 8-bit unsigned number composed of PRS and
V
PR*
set by an interface command.
The corresponding voltage at the reference temperature,
T
CUT
, can be calculated as:
BS[2]
BS[1]
BS[0]
n
RECOMMENDED
MULTIPLEX RATES
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
7
6
5
4
3
2
1
0
1 : 100
1 : 80
1 : 65 or 1 : 67
1 : 48
1 : 34 or 1 : 40
1 : 24
1 : 18 or 1 : 16
1 : 10, 1 : 9 or 1 : 8
n
68
3
–
5.246
5
=
=
=
SYMBOL
BIAS VOLTAGES
BIAS
VOLTAGES
FOR
1
/
9
BIAS
V
LCD
8
/
9
×
V
LCD
V1
V2
V
LCD
+
n
+
V3
7
/
9
×
V
LCD
V4
(1)
2
/
9
×
V
LCD
V5
(2)
1
/
9
×
V
LCD
V6
V
SS
V
SS
3
4
(
)
)
-n
n
2
4
+
+
(
(
)
)
-n
+
n
4
(
)
-------2
+
n
4
(
)
-------1
V
OP
V
CAL
4:0
[
]
V
PR
+
=
V
LCD Tcut
)
a
V
OP
b
×
+
(
)
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCF8813U | (67 + 1) x 102 pixels matrix LCD driver |
| PCF8820 | 67 x 101 Grey-scale/ECB colour dot matrix LCD driver |
| PCF8820U | 67 x 101 Grey-scale/ECB colour dot matrix LCD driver |
| PCF8831 | STN RGB - 160 output row driver |
| PCF8831U | STN RGB - 160 output row driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8813U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:(67 + 1) x 102 pixels matrix LCD driver |
| PCF8820 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:67 x 101 Grey-scale/ECB colour dot matrix LCD driver |
| PCF8820U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:67 x 101 Grey-scale/ECB colour dot matrix LCD driver |
| PCF8831 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:STN RGB - 160 output row driver |
| PCF8831U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:STN RGB - 160 output row driver |
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