SSD1820ATR1 ETC1 [List of Unclassifed Manufacturers], SSD1820ATR1 Datasheet - Page 18

• Manufacturer Part Number: SSD1820ATR1
• Description: LCD Segment / Common Driver with Controller CMOS
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

SSD1820A/21
18
COMMAND TABLE
Hex
00~0F
10~17
18~1F
20~27
28~2F
30~3F
40~43
44~47
48~4B
4C~4F
50~57
D7
0
0
0
0
0
x
0
x
0
x
0
x
0
REV 1.4
01/03
D6 D5
0
0
0
0
1
L6
1
C6
1
D6
1
x
1
0
0
1
1
0
L5
0
C5
0
D5
0
x
0
D4 D3
0
1
0
0
0
L4
0
C4
0
D4
0
N4
1
C3
0
0
1
0
L3
0
C3
1
D3
1
N3
0
D2 D1
C2 C1
C6 C5
R2 R1
VC VR V F Set Power Control Register
0
L2
1
C2
0
D2
1
N2
B2 B1
x
L1
x
C1
x
D1
x
N1
D0 Command
C0 Set Lower Column Address
C4 Set Upper Column Address
R0 Set Internal Regulator Resis-
x
L0
x
C0
x
D0
x
N0
B 0 Set LCD Bias
Reserved
tor Ratio
Reserved
Set Display Start Line
Set Display Offset
Set Multiplex Ratio
Set N-line Inversion
Comment
Sets the lower nibble of the column address pointer for
RAM access. The pointer is reset to 0 after reset.
Sets the upper nibble of the column address pointer for
RAM access. The pointer is reset to 0 after reset.
Reserved
The internal regulator gain (1+R2/R1)Vcon increases as
R2R1R0 is increased from 000b to 111b. The resistor
ratio (1+R2/R1) is given by:
R2R1R0 = 000: 2.3 (POR)
R2R1R0 = 001: 3.0
R2R1R0 = 010: 3.7
R2R1R0 = 011: 4.4
R2R1R0 = 100: 5.1
R2R1R0 = 101: 5.8
R2R1R0 = 110: 6.5
R2R1R0 = 111: 7.2
VC=0: turns OFF the internal voltage booster (POR)
VC=1: turns ON the internal voltage booster
VR=0: turns OFF the internal regulator (POR)
VR=1: turns ON the internal regulator
VF=0: turns OFF the output op-amp buffer (POR)
VF=1: turns ON the output op-amp buffer
Reserved
The next command specifies the row address pointer
(0-63) of the RAM data to be displayed in COM0. This
command has no effect on COMS. The pointer is set to
0 after reset.
The next command specifies the mapping of first display
line (COM0) to one of ROW0~63. This command has no
effect on COMS. COM0 is mapped to ROW0 after reset.
The next command specifies the number of lines,
excluding COMS, to be displayed. With Icon is disabled
(POR), duties 1/16~1/64 or 1/80 could be selected. With
Icon enabled, the available duty ratios are 1/17~ 1/65 or
1/81.
The next command sets the n-line inversion register
from 3 to 33 lines to reduce display crosstalk. Register
values from 00001b to 11111b are mapped to 3 lines to
33 lines respectively. Value 00000b disables the N-line
inversion, which is the POR value.
To avoid a fix polarity at some lines, it should be noted
that the total number of mux (including the icon line)
should NOT be a multiple of the lines of inversion (n).
Sets the LCD bias from 1/4 ~ 1/10 according to
B2B1B0:
000: 1/4 bias
001: 1/5 bias
010: 1/6 bias
011: 1/7bias
100: 1/8 bias
101: 1/9 bias (POR for SSD1820A)
110: 1/9 bias (for SSD1820A)
111: 1/9 bias (for SSD1820A); 1/10 bias (for SSD1821)
1/10 bias (POR for SSD1821)
SOLOMON