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參數(shù)資料
| 型號： | PCF8548 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 65 x 102 pixels matrix LCD driver |
| 中文描述： | 65 × 102像素矩陣LCD驅(qū)動器 |
| 文件頁數(shù)： | 19/40頁 |
| 文件大?。?/td> | 206K |
| 代理商： | PCF8548 |
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1999 Aug 16
19
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
PCF8548
12.6
Set X address of RAM
The X address points to the columns. The range of X is
0 to 101 (65H).
12.7
Set HV generator stages
12.7.1
S[1:0]
The PCF8548 incorporates a software configurable
voltage multiplier. After reset the voltage multiplier is set to
2
×
V
DD2
. Other voltage multiplier factors are set via the
command ‘set HV-gen stages’ (see Tables 1 and 2).
12.8
Temperature control
Due to the temperature dependency of the liquid crystals
viscosity, the LCD controlling voltage V
LCD
must be
increased with lower temperature to maintain optimum
contrast.
There are 4 different temperature coefficients available in
the PCF8548 (see Fig.15). The coefficients are selected
by the two bits TC[1:0]. Table 6 shows the typical values of
the different temperature coefficients. The coefficients are
proportional to the programmed V
LCD
.
12.9
Bias system
The Bias voltage levels are set in the ratio
of R
R
nR
R
R giving a
bias system.
The resulting bias levels are shown in Table 5.
Different multiplex rates require different factors n (see
Table 4); this is programmed by BS[2 : 0]. For Mux 1 : 65
the optimum bias value n is given by:
resulting in
1
9
bias.
+
4
n
n
m
3
–
65
3
–
5.06
5
=
=
=
=
Fig.15 Temperature coefficients.
handbook, halfpage
MGS402
T
Tcut
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|---|---|
| PCF8549 | 65 x 102 pixels matrix LCD driver |
| PCF8549U | 65 x 102 pixels matrix LCD driver |
| PCF8558 | Universal LCD driver for small graphic panels(應(yīng)用于小型圖形面板的通用LCD驅(qū)動器) |
| PCF8558U | Universal LCD driver for small graphic panels |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8548U/2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:65 x 102 pixels matrix LCD driver |
| PCF8548U/9 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:65 x 102 pixels matrix LCD driver |
| PCF8549 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:65 x 102 pixels matrix LCD driver |
| PCF8549U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:65 x 102 pixels matrix LCD driver |
| PCF8549U/2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:65 x 102 pixels matrix LCD driver |
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