SSD1821 Solomon Systech, SSD1821 Datasheet - Page 11

• Manufacturer Part Number: SSD1821
• Description: (SSD1820A / SSD1821) LCD Segment / Common Driver
• Manufacturer: Solomon Systech

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V
ated by the internal bias divider. They have the following relation-
ship:
COM0 - COM63/COM79
COM79 to the LCD panel. See Table 1 or 2 about the COM signal
mapping in different multiplex ratio N.
ICONS
SEG0 - SEG127
level is V
CL
enabled by using an extended command. Under normal operation,
this pin should be left opened and internal oscillator will be used
after power on reset.
N/C
nal pins nor shorted together. They should be left open.
L5
LCD driving voltages. They can be supplied externally or gener-
For SSD1820A, a equals to 9 at POR.
For SSD1821, a equal to 10 at POR.
These pins provide the row driving signal COM0 - COM63/
This pin is the special icons line COM signal output.
These pins provide the LCD column driving signal. Their voltage
This pin is the external clock input for the device which is
These No Connection pins should NOT be connected to any sig-
SOLOMON
V
V
V
V
, V
L5
L4
L3
L2
L4
, V
SS
L3
during sleep mode and standby mode.
and V
(a-1)/a*V
(a-2)/a*V
V
1:a bias
2/a*V
1/a*V
L6
L2
> V
L6
L6
L6
L6
L5
> V
L 4
> V
L3
> V
L2
> V
S S
REV 1.4
01/03
SSD1820A/21
11