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SH79F3283
71
Table 8.2
LCD Control Register 1
ADH, Bank0
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DISPCON1
MODSW
DUTY2
DUTY1
RLCD
FCCTL1
FCCTL2
MOD1
MOD0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset Value
(POR/WDT/LVR/PIN)
0
0
0
0
0
0
0
0
Bit Number
Bit Mnemonic
Description
7
MODSW
LCD/LED shared control bit
0: P0SS is valid
1: all the LCD/LED Pins worked as IO
6-5
DUTY[2:1]
LCD duty selection bit (Combination control with DUTY0)
000:
1/4
duty,
1/3
bias (4 COM X 28 SEG)
COM: COM1-4
SEG: SEG1-28
001:
1/8
duty,
1/4
bias (8 COM X 24 SEG)
COM: COM1-8
SEG: SEG1-24
010:
1/4
duty,
1/3
bias (4 COM X 28 SEG)
COM: COM5-8 shared as COM1-4
SEG: SEG1-24, COM1-4 shared as SEG25-28
011:
1/5
duty,
1/3
bias (5 COM X 27 SEG)
COM: COM1-5
SEG: SEG1-24, COM6-8 shared as SEG25-27
100:
1/6
duty,
1/3
bias (6 COM X 26 SEG)
COM: COM1-6
SEG: SEG1-24, COM7-8 shared as SEG25-SEG26
101:
1/6
duty,
1/4
bias (6 COM X 26 SEG)
COM: COM1-6
SEG: SEG1-24, COM7-8 shared as SEG25-SEG26
others:
1/4
duty,
1/3
bias (4 COM X 28 SEG)
COM: COM1-4
SEG: SEG1-28
4
RLCD
LCD bias resistor control bit
0: LCD bias resistor sum is 225k
1: LCD bias resistor sum is 900k
3-2
FCCTL[1:0]
Fast charge time control bits
00: 1/8LCD com period
01: 1/16 LCD com period
10: 1/32 LCD com period
11: 1/64 LCD com period
1-0
MOD[1:0]
LCD driver mode control bits
00: traditional mode, bias resistor sum is 225k/900k
01: traditional mode, bias resistor sum is 60k
10: fast charge mode, bias resistor sum between 60k and 225k/900k
Note: When MODSW = 1, set OP_MODSW to keep LCD counter data or not. When OP_MODSW = 0, the LCD counter data
scan continue, when OP_MODSW = 1, the LCD counter data scan stop, keep the data, continue scan when MODSW = 0.