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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

ALTERNATE DISPLAY BANK