AS1106 데이터 시트보기 (PDF) - austriamicrosystems AG
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AS1106 Datasheet PDF : 20 Pages
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AS1106, AS1107
Data Sheet
austriamicrosystems
8x8 LED Dot Matrix Driver
8x8 LED Dot Matrix Driver
The application example in Figure 13 shows the AS1106 as an 8x8 LED dot matrix driver.
The LED columns have common cathodes 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 listed
in Table 6 on page 8.
The Decode Enable Register (see page 9) must be set to ‘00000000’ as described in Table 8 on page 9. Single LEDs
in a column can be addressed as described in Table 11 on page 10, where bit D0 corresponds to segment G and bit
D7 corresponds to segment DP.
Note: For a multiple-digit dot matrix, multiple AS1106 devices must be cascaded.
Figure 13. Application Example as LED Dot Matrix Driver
Diode Arrangement
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
SEG DP
8x8 LED Dot Matrix
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
SEG DP
8x8 LED Dot Matrix
Micro-
Processor
SEG A:G DIG0:7
SEG DP
DOUT
DIN
VDD
LOAD/CSN
CLK
GND
ISET
GND
VBAT
9.53kΩ
SEG A:G DIG0:7
SEG DP
DIN
VDD
LOAD/CSN
CLK
GND
ISET
GND
VBAT
9.53kΩ
Cascading Drivers
The example in Figure 4 drives 2 dot matrix digits using a 4-wire microprocessor interface. All Scan-Limit Registers
should be set to the same value so that one display will not appear brighter than the other.
For example, to display 12 digits, set both Scan-Limit Registers to display 6 digits so that both displays have a 1/6 duty
cycle per digit. If 11 digits are needed, set both Scan-Limit Registers to display 6 digits and leave one digit uncon-
nected. Otherwise, if one driver is set to display 6 digits and the other to display 5 digits one display will appear brighter
because its duty cycle per digit will be 1/5 and the other display’s duty cycle will be 1/6.
Note: Refer to No-Op Register (0xX0) on page 12 for additional information.
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Revision 2.2
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