ML51/ML54/ML56
Sep. 01, 2020
Page
619
of 719
Rev 2.00
ML
51
/ML
54
/ML
5
6 S
E
RI
E
S
TECHNI
CA
L
RE
F
E
R
E
NC
E
M
A
NU
A
L
ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
LCDCON
– LCD Control
Register
SFR Address
Reset Value
LCDCON
F9H, Page 3
0000_0000 b
7
6
5
4
3
2
1
0
LCDEN
TYPE
BIAS[1:0]
DUTY[1:0]
-
-
R/W
R/W
R/W
R/W
-
-
Bit
Name
Description
[7]
LCDEN
LCD Enable
0 = LCD circuit OFF. Each COM and SEG pin functions as general purpose I/O and its
multi-functions other than LCD.
1 = LCD circuit ON. COM and enabled SEG pins generate the LCD driving waveform.
[6]
TYPE
Display Type
0 = Type A
1 = Type B (Power saving mode)
[5:4]
BIAS[1:0]
LCD Bias
00 = Reserved.
01 = 1/2 bias.
10 = 1/3 bias.
11 = 1/4 bias
[3:2]
DUTY[1:0]
LCD Duty
00 = 1/4 duty.
01 = 1/6 duty.
10 = 1/8 duty.
11 = Reserved.
Note that when 1/4 duty is selected, only COM0 to COM3 are used for LCD driving. When
1/6 or 1/8 duty is selected that means 6 COM or 8 COM pins are used, and the SEG pins
will be used according to the definition of multiple function pin setting. When those SEG
pins were used as COM pins, these SEG bits are unavailable.
[1:0]
-
Reserved
