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Fig.16 Duplex display; expansion to 2

× 128 segments using four PCF8577Cs.

MGA736

VDD

VSS

SDA

SCL

A0

A1

BP2

BP1

S32

S31

S1

S2

PCF8577C

OSC

A2

Cosc

R

osc

VDD

VSS

SDA

SCL

device subaddress

A1.A0 = 00

VDD

VSS

SDA

SCL

A0

A1

BP2

BP1

S32

S31

S1

S2

PCF8577C

OSC

A2

device subaddress

A1.A0 = 01

VDD

VSS

SDA

SCL

A0

A1

BP2

BP1

S32

S31

S1

S2

PCF8577C

OSC

A2

device subaddress

A1.A0 = 11

128

64

33

32

1

DUPLEX LCD DISPLAY

BP2

BP1