PCF8576C Philips Semiconductors, PCF8576C Datasheet - Page 8

• Manufacturer Part Number: PCF8576C
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: Philips Semiconductors

Philips Semiconductors
6
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.
Table 1 Selection of display configurations
1998 Jul 30
handbook, full pagewidth
BACKPLANES SEGMENTS
Universal LCD driver for low multiplex
rates
FUNCTIONAL DESCRIPTION
4
3
2
1
NUMBER OF
V
V
160
120
SS
DD
CONTROLLER
PROCESSOR/
80
40
MICRO-
MICRO-
HOST
R
2C B
t r
7-SEGMENTS NUMERIC
DIGITS
20
15
10
5
Fig.4 Typical system configuration.
OSC
SDA
SCL
INDICATOR
1
2
6
SYMBOLS
7
A0
20
15
10
5
PCF8576CT
V
5
8
DD
A1
8
9
The host microprocessor/microcontroller maintains the
2-line I
PCF8576C. The internal oscillator is selected by tying
OSC (pin 6) to V
voltages for the multiplexed LCD waveforms are
generated internally. The only other connections required
to complete the system are to the power supplies (V
V
application.
A2
12
SS
V
10
17 to 56
13 to 16
LCD
SA0 V
and V
CHARACTERS
2
11
C-bus communication channel with the
SS
10
LCD
40 segment drives
8
5
2
4 backplanes
ALPHANUMERIC
14-SEGMENTS
) and the LCD panel chosen for the
SS
(pin 11). The appropriate biasing
INDICATOR
SYMBOLS
LCD PANEL
20
10
12
(up to 160
elements)
8
MBE524
Product specification
PCF8576C
160 dots (4
120 dots (3
80 dots (2
40 dots (1
DOT MATRIX
40)
40)
DD
40)
40)
,