PCF8576_01 datasheet(7/44 Pages) PHILIPS

Part #	PCF8576

Description	Universal LCD driver for low multiplex rates

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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7 / 44 page

2001 Oct 02

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 .

All of the display configurations given in Table can be

implemented in the typical system shown in Fig.3.

The host microprocessor/microcontroller maintains the

2-line I2C-bus communication channel with the PCF8576.

The internal oscillator is selected by connecting pin OSC

to pin VSS. 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.

Selection of display conﬁgurations

NUMBER OF

7-SEGMENTS NUMERIC

14-SEGMENTS

ALPHANUMERIC

DOT MATRIX

BACKPLANES

SEGMENTS

DIGITS

INDICATOR

SYMBOLS

CHARACTERS

INDICATOR

SYMBOLS

4

160

20

10

20

160 dots (4

× 40)

3

120

15

8

120 dots (3

× 40)

2

80

10

5

10

80 dots (2

× 40)

1

40552

12

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

2

6

78

512

910

11

40 segment drives

4 backplanes

LCD PANEL

(up to 160

elements)

PCF8576

A0

A1

A2

SS

SA0 V

SS

V

DD

V

DD

V

LCD

V

MBK277

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PCF8576 Datasheet(PDF) 7 Page - NXP Semiconductors

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