AS1100 AMSCO, AS1100 Datasheet - Page 9

• Manufacturer Part Number: AS1100
• Description: Serially Interfaced 8-Digit LED Driver
• Manufacturer: AMSCO

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Data Sheet AS1100
8x8 LED Dot Matrix Driver
The example in Figure 3 uses the AS1100 to drive an 8x8 LED dot matrix. The LED columns have common cathode
and are connected to the DIG0-7 outputs. The rows are connected to the segment drivers. Each of the 64 LEDs can
be addressed separately. The columns are selected via the digits as shown in Table 2. The decode mode register
(0xX9) has to be programmed to ‘00000000’ as stated in Table 4. The single LEDs in a column can be addressed as
stated in Table 6, where D0 corresponds to segment G and d/ to segment DP. For a multiple digit dot matrix several
AS1100 have to be cascaded.
Figure 3: Application example as LED dot matrix driver
Cascading Drivers
The AS1100 can be cascaded as well. The DOUT pin must be connected to the DIN pin of the following AS1100.
Table 13: Package thermal resistance data
Revision 1.32, Oct. 2004
Package
24 Narrow DIP
24 Wide SO
Maximum Junction Temperature (T
Maximum Ambient Temperature (T
Diode Arrangement
µP
12
1
1
9
SEG A-G
SEP DP
DIN
LOA
CLK
GND GND
Thermal Resistance (
+75°C/W
+85°C/W
SEG DP
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
4
A
DIG 0
J
DIG 0-
) = +150°C
) = +85°C
DOUT
VDD
ISET
8x8 LED Dot
M t i
18
24
19
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JA
VBAT
9.53k
)
DIG 7
12
1
1
9
SEG A-G
SEP DP
DIN
LOA
CLK
GND GND
SEG DP
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
4
DIG 0
DIG 0-
VDD
ISET
8x8 LED Dot
M t i
19
18
VBAT
9.53k
DIG 7
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