參數(shù)資料
型號(hào): PCF8576C
廠(chǎng)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(yè)數(shù): 7/40頁(yè)
文件大小: 243K
代理商: PCF8576C
1998 Feb 06
7
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
PCF8576
6
FUNCTIONAL DESCRIPTION
The PCF8576 is a versatile peripheral device designed to
interface to any microprocessor/microcontroller to a wide
variety of LCDs. It can directly drive any static or
multiplexed LCD containing up to four backplanes and up
to 40 segments. The display configurations possible with
the PCF8576 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
2-line I
2
C-bus communication channel with the PCF8576.
The internal oscillator is selected by connecting pin OSC
to pin 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
the LCD panel chosen for the application.
Table 1
Selection of display configurations
NUMBER OF
7-SEGMENTS NUMERIC
14-SEGMENTS
ALPHANUMERIC
DOT MATRIX
BACKPLANES
SEGMENTS
DIGITS
INDICATOR
SYMBOLS
CHARACTERS
INDICATOR
SYMBOLS
4
3
2
1
160
120
80
40
20
15
10
5
20
15
10
5
10
8
5
2
20
8
10
12
160 dots (4
×
40)
120 dots (3
×
40)
80 dots (2
×
40)
40 dots (1
×
40)
Fig.3 Typical system configuration.
handbook, full pagewidth
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
R
tr
2CB
SDA
SCL
OSC
ROSC
1
17 to 56
13 to 16
10
SA0 V
2
6
7
8
5
12
9
11
40 segment drives
4 backplanes
LCD PANEL
(up to 160
elements)
PCF8576
A0
A1
A2
SS
SS
V
DD
V
DD
V
LCD
V
MBK277
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