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參數(shù)資料
| 型號： | OM4085 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal LCD driver for low multiplex rates |
| 中文描述： | 通用LCD驅(qū)動(dòng)器的低復(fù)用率 |
| 文件頁數(shù)： | 5/36頁 |
| 文件大小： | 225K |
| 代理商： | OM4085 |
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1997 Feb 25
5
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
OM4085
FUNCTIONAL DESCRIPTION
The OM4085 is a versatile peripheral device designed to
interface any microprocessor to a wide variety of LCDs.
It can directly drive any static or multiplexed LCD
containing up to 4 backplanes and up to 24 segments.
The display configurations possible with the OM4085
depend on the number of active backplane outputs
required; a selection of display configurations is given in
Table 1.
All of the display configurations given in Table 1 can be
implemented in the typical system shown in Fig.3.
The host microprocessor/microcontroller maintains the
two-line I
2
C-bus communication channel with the
OM4085. The internal oscillator is selected by tying OSC
(pin 6) to V
SS
. The appropriate biasing voltages for the
multiplexed LCD waveforms are generated internally.
The only other connections required to complete the
system are to the power supplies (V
DD
, V
SS
and V
LCD
) and
to the LCD panel chosen for the application.
Table 1
Selection of display configurations
ACTIVE
BACKPLANE
OUTPUTS
NUMBER OF
SEGMENTS
7-SEGMENT NUMERIC
14-SEGMENT
ALPHANUMERIC
DOT MATRIX
4
96
12 digits + 12 indicator
symbols
9 digits + 9 indicator
symbols
6 digits + 6 indicator
symbols
3 digits + 3 indicator
symbols
6 characters + 12 indicator
symbols
4 characters + 16 indicator
symbols
3 characters + 6 indicator
symbols
1 character + 10 indicator
symbols
96 dots (4
×
24)
3
72
72 dots (3
×
24)
2
48
48 dots (2
×
24)
1
24
24 dots
Fig.3 Typical system configuration.
handbook, full pagewidth
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
SDA
SCL
OSC
1
17 to 40
13 to 16
10
SA0
2
6
7
8
5
12
9
11
24 segment drives
4 backplanes
LCD PANEL
(up to 96
elements)
OM4085
A0
A1
A2
VDD
VDD
VLCD
VSS
VSS
MBH951
≤
R
trise
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