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SSD1828
Rev 1.10
07/2002
SOLOMON
18
Bit Pattern
0100 10XX
XD
6
D
5
D
4
D
3
D
2
D
1
D
0
Command
Set Multiplex Ratio
(partial display)
Description
The second command specifies the number of lines,
excluding ICONS, to be displayed. With Icon is disabled
(POR), 16~64 mux could be selected. With Icon
enabled, the available mux are 17~ 65.
D6 – D0 Mux (Icon disable) Mux (Icon enable)
000000 invalid invalid
…
0001111 invalid invalid
0010000 16 17
0010001 17 18
…
1000000 64 65
1000001 invalid invalid
1000010 invalid invalid
…
1111111 invalid invalid
The second 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 ~ 1/9 according to B
2
B
1
B
0
:
000: 1/4 bias
001: 1/5 bias
010: 1/6 bias
011: 1/7 bias
100: 1/8 bias
101: 1/9 bias (POR)
110: 1/9 bias
111: 1/9 bias
Set the DC-DC multiplying factor from 2X to 5X
B
1
B
0
:
00: 3X
01: 4X
10: 5X
11: 2X (POR)
The second command sets one of the 64 contrast
levels. The darkness increase as the contrast level
increase.
S
0
=0: column address 00H is mapped to SEG0 (POR)
S
0
=1: column address 5FH is mapped to SEG0
C
0
=0: Disable icon row (Mux = 16 to 64, POR)
C
0
=1: Enable icon row (Mux = 17 to 65)
E
0
=0: Normal display (display according to RAM
contents, POR)
E
0
=1: All pixels are ON regardless of the RAM contents
*Note: This command will override the effect of “Set
Normal/Invert Display”
R
0
=0: Normal display (display according to RAM
contents, POR)
R
0
=1: Invert display (ON and OFF pixels are inverted)
*Note: This command will not affect the display of the
icon lines
0100 11XX
XXXN
4
N
3
N
2
N
1
N
0
Set N-line Inversion
0101 0B
2
B
1
B
0
Set LCD Bias
0110 01B
1
B
0
Set Boost Level
1000 0001
XXC
5
C
4
C
3
C
2
C
1
C
0
Set Contrast Level
1010 000S
0
Set Segment Re-map
1010 001C
0
Icon Control Register
ON/OFF
Entire Display Select
1010 010E
0
1010 011R
0
Invert Display Select