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(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
Symbol
7
LCDC
LCDC7
LCDC7
0
0
0
0
0
0
0
0
1
Other than above
LIPS
0
1
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.
CHAPTER 16 LCD CONTROLLER/DRIVER
R/W
6
5
LCDC6
LCDC5
LCDC4
LCDC6
LCDC5
LCDC4
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
LCD Driving Power Supply Selection
Does not supply power to LCD.
Supplies power to LCD from V
Preliminary User's Manual U14581EJ3V0UM00
4
3
2
0
0
P81/S19 to P97/S5 Pin Functions
Port Pins
0
P81 to P97
1
P81 to P95
0
P81 to P93
1
P81 to P91
0
P81 to P87
1
P81 to P85
0
P81 to P83
1
P81
0
None
Setting prohibited
pin.
DD
1
0
0
LIPS
Segment Pins
None
S5, S6
S5 to S8
S5 to S10
S5 to S12
S5 to S14
S5 to S16
S5 to S18
S5 to S19
211
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