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CHAPTER 16 LCD CONTROLLER/DRIVER
Preliminary User’s Manual U14581EJ3V0UM00
(2) LCD display control register (LCDC)
This register sets cutoff of the current flowing to split resistors for LCD drive voltage generation and switchover
between segment output and input/output port functions.
LCDC is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears LCDC to 00H.
Figure 16-4. LCD Display Control Register (LCDC) Format
Address: FFB2H After Reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
LCDC
LCDC7
LCDC6
LCDC5
LCDC4
0
0
0
LIPS
LCDC7
LCDC6
LCDC5
LCDC4
P81/S19 to P97/S5 Pin Functions
Port Pins
Segment Pins
0
0
0
0
P81 to P97
None
0
0
0
1
P81 to P95
S5, S6
0
0
1
0
P81 to P93
S5 to S8
0
0
1
1
P81 to P91
S5 to S10
0
1
0
0
P81 to P87
S5 to S12
0
1
0
1
P81 to P85
S5 to S14
0
1
1
0
P81 to P83
S5 to S16
0
1
1
1
P81
S5 to S18
1
0
0
0
None
S5 to S19
Other than above
Setting prohibited
LIPS
LCD Driving Power Supply Selection
0
Does not supply power to LCD.
1
Supplies power to LCD from V
DD
pin.
Cautions 1. Pins which perform segment output cannot be used as output port pins even if 0 is set
in the port mode register.
2. If a pin which performs segment output is read as a port, its value will be 0.
3. If a pin set as a segment output pin is not used, leave that pin open.
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