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DUPLEX LCD DISPLAY
1
32
33
64
VDD
Cosc
VSS
SCL
SDA
Rosc
S2
S1
BP1
A2
BP2
VDD
A1
A0 OSC
VSS
SCL
SDA
S31
PCF8577C
S32
device subaddress
A1.A0 = 00
S2
S1
BP1
A2
BP2
VDD
A1
A0 OSC
VSS
SCL
SDA
S31
PCF8577C
S32
device subaddress
A1.A0 = 01
BP2
BP1
128
S2
S1
BP1
A2
BP2
VDD
A1
A0 OSC
VSS
SCL
SDA
S31
PCF8577C
S32
device subaddress
A1.A0 = 11
MGA736
Fig.16 Duplex display; expansion to 2 × 128 segments using four PCF8577Cs.