PCF8576C 查看數據表（PDF） - Philips Electronics
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PCF8576C Datasheet PDF : 44 Pages
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Philips Semiconductors
Universal LCD driver for low multiplex
rates
Product specification
PCF8576C
6 FUNCTIONAL DESCRIPTION
The PCF8576C 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 PCF8576C 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.4.
The host microprocessor/microcontroller maintains the
2-line I2C-bus communication channel with the
PCF8576C. The internal oscillator is selected by tying
OSC (pin 6) to VSS (pin 11). 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 (VDD,
VSS and VLCD) and the LCD panel chosen for the
application.
Table 1 Selection of display configurations
NUMBER OF
BACKPLANES SEGMENTS
4
160
3
120
2
80
1
40
7-SEGMENTS NUMERIC
DIGITS
20
15
10
5
INDICATOR
SYMBOLS
20
15
10
5
14-SEGMENTS
ALPHANUMERIC
CHARACTERS
INDICATOR
SYMBOLS
10
20
8
8
5
10
2
12
DOT MATRIX
160 dots (4 × 40)
120 dots (3 × 40)
80 dots (2 × 40)
40 dots (1 × 40)
handbook, full pagewidth
VDD
R tr
2CB
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
VSS
VDD
VLCD
5
SDA 1
12
17 to 56 40 segment drives
SCL 2 PCF8576CT
OSC
6
13 to 16 4 backplanes
7 8 9 10 11
A0 A1 A2 SA0 VSS
LCD PANEL
(up to 160
elements)
MBE524
1998 Jul 30
Fig.4 Typical system configuration.
8
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