PCF8578T/1,118 Datasheet PCF8578T/1,118, PCF8578H/1,157 | P31-P33

2003 Apr 14 31

Philips Semiconductors Product speciﬁcation

LCD row/column driver for

dot matrix graphic displays

PCF8578

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Fig.23 Segment driver application for up to 384 segments.

(1) Can be used for creating blinking characters.

0

16 17

39

0

1

2

3

R8

R15

LCD

DISPLAY

RAM

PCF8578

Bank

(Using 1:16 mux, the first

character data must be

loaded in bank 0 and 1

starting at byte number 16)

one line of 24 digits 7 segment

one line of 12 digits star-burst

(mux 1:16)

Total: 384 segments

PCF8578: Segment Driver

Application

R0

R7

a

b

c

d

e

f

g

dp

a

b

f

g

c

e

d

dp

1-byte

LSB

MSB

1

12

MLB423

(1)

C16 C17 C39

ALTERNATE DISPLAY BANK

FREE RAM

2003 Apr 14 32

Philips Semiconductors Product speciﬁcation

LCD row/column driver for

dot matrix graphic displays

PCF8578

This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in

_white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in

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R

OSC

V

SS

SCL SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

1

40

columns

subaddress 0

V

SS

SCLSDA

SA0

CLK SYNC

V

3

V

4

V

DD

V

LCD

PCF8578

(ROW MODE)

V

LCD

V

DD

V

2

V

5

V

SS

unused columns

8

SCL

SDA

V

DD

V

SS

32

rows

R

C

V

SS

SCL SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

2

40

columns

subaddress 1

V

DD

V

SS

SCL SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

k

40

columns

V

DD

subaddress k 1

1:32 multiplex rate

32 x 40 x k dots (k 16)

(20480 dots max.)

LCD DISPLAY

V

DD

(4 2 3)R

V

SS

MSA845

Fig.24 Typical LCD driver system with 1 : 32 multiplex rate.

2003 Apr 14 33

Philips Semiconductors Product speciﬁcation

LCD row/column driver for

dot matrix graphic displays

PCF8578

This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in

_white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in

white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ...

R

OSC

V

SS

SCL

SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

1

40

columns

subaddress 0

V

SS

SCL

SDA

SA0

CLK SYNC

V

3

V

4

V

DD

V

LCD

PCF8578

(ROW MODE)

V

LCD

V

DD

V

2

V

5

V

SS

V

DD

/

V

SS

unused columns

16

8

rows

SCL

SDA

V

DD

V

SS

1:16 multiplex rate

16 x 40 x k dots (k 16)

(10240 dots max.)

16

rows

R

C

V

SS

SCLSDASA0

CLK

SYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

DD

PCF8579

1

40

columns

subaddress 0

V

DD

V

SS

V

SS

SCLSDASA0

CLK

SYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

DD

PCF8579

40

columns

V

DD

V

SS

subaddress k 1

k

V

SS

SCL

SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

2

40

columns

subaddress 1

V

DD

V

SS

SCL

SDA SA0

CLKSYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

SS

V

SS

PCF8579

k

40

columns

V

DD

subaddress k 1

1:16 multiplex rate

16 x 40 x k dots (k 16)

(10240 dots max.)

LCD DISPLAY

V

SS

SCLSDASA0

CLK

SYNC

V

3

V

4

V

DD

V

LCD

A0

A1

A2

A3

V

DD

PCF8579

2

40

columns

subaddress 1

V

DD

V

SS

V

DD

MSA847

Fig.25 Split screen application with 1 : 16 multiplex rate for improved contrast.

PCF8578T/1,118

PCF8578T/1,118

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