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DIRECT DRIVE LCD DISPLAY
32 33
backplane
256
1
64
S2
S1
S2
S1
S2
S1
BP1
BP2
BP1
BP2
BP1
BP2
A2
A2
A2
V
V
V
V
DD
DD
DD
DD
A1
A0 OSC
C
osc
A1
A0
A1
A0
R
OSC
osc
OSC
V
V
V
V
SS
SS
SCL
SDA
SS
SCL
SDA
SS
SCL
SDA
SCL
SDA
S31
S32
S31
S32
S31
PCF8577C
PCF8577C
PCF8577C
S32
device subaddress
A2.A1.A0 = 000
device subaddress
A2.A1.A0 = 001
device subaddress
A2.A1.A0 = 111
MGA735
Fig.15 Direct display driver; expansion to 256 segments using eight PCF8577Cs.
NXP [ NXP ]
