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Block diagram of pins related to LCD controller/driver
For pins that can also serve as segment output pins:
Common/segment control
signal
LCD driving voltage (V
Reset/operation stop signal
LCD driving voltage (V
Common/segment control
signal
RDR read
RDR read (at executing bit
manipulation instruction)
PDR write
PDR write
SPL: Pin state specification bit of standby control register (STBC)
V
to V
: Voltages of V0 to V3 pins
0
3
Fig. 14.7 Block Diagram of Pins Related to LCD Controller/Driver
LCD CONTROLLER/DRIVER
or V
)
3
2
or V
)
1
0
PDR (Port data register)
Output latch
DDR
(Port direction register)
Stop mode (SPL = 1) or LCD enabling
Pch
Nch
Pch
Nch
Stop mode (SPL = 1) or
LCD enabling
14-11
LCRH Setting
Pch
Pin
Nch
P36/SEG12 to P37/SEG13
P40/SEG14 to P47/SEG21
P90/SEG22 to P91/SEG23
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