AS1105
器件描述：Serially Interfaced, 4-Digit LED Driver
器件厂商：AMSCO [austriamicrosystems AG]
文件大小：142.59KB，共12页
Sponsor by e络盟器件资料摘要：
Data Sheet AS1105
Revision 1.32, Oct. 2004 Page 1 of 12
Key Features
- Cost effective version of AS1100 functionality for
applications up to 4-Digits
- 10MHz Serial Interface
- Individual LED Segment Control
- Decode/No-Decode Digit Selection
- 20µA Low-Power Shutdown (Data Retained)
- Extremely low Operating Current 0.5mA in open loop
- Digital and Analog Brightness Control
- Display Blanked on Power-Up
- Drive Common-Cathode LED Display
- Software Reset
1
- Optional External clock
- 20 pin SO Packages
General Description
The AS1105 is an LED driver for 7 segment numeric
displays of up to 4 digits. The AS1105 can be programmed
via a conventional 4 wire serial interface. It includes a BCD
code-B decoder, a multiplex scan circuitry, segment and
display drivers and a 32 Bit memory. The memory is used to
store the LED settings, so that continuous reprogramming is
not necessary.
1
Software Reset and external clock are not supported by
MAX7219
Every individual segment can be addressed and updated
separately. Only one external resistor is required to set the
current through the LED display. Brightness can be
controlled either in an analog or digital way. The user can
choose the internal code-B decoder to display numeric
digits or to address each segment directly. The AS1105
features an extremely low shutdown current of only 20µA.
and an operational current of less than 500µA. The number
of visible digits can be programmed as well. The AS1105
can be reset by software and an external clock can be used.
Several test modes support easy debugging.
AS1105 is offered in a 20 SOIC package.
Applications
- Bar-Graph Displays
- Industrial Controllers
- Panel Meters
- LED Matrix Displays
- White Goods
Serially Interfaced, 4-Digit LED Driver
AS1105
DATA SHEET
Pin Configuration
Typical Application Circuit
4-Digit µP Display
8 Segments
4 Digits
9.53k
+5V
MOSI
µP I/O
SCK
LOAD
CLK
GND
GND
DIG0-DIG3
SEG A-G
SEP DP
VDD
ISET
DIN
AS1105
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
SO
DOUT
DIN
DIG3
GND
DIG0
CLK
DIG2
DIG1
GND
LOAD
SEG D
ISET
SEG G
SEG F
VDD
SEG DP
SEG C
SEG A
SEG B
SEG E
TOP
Revision 1.32, Oct. 2004 Page 1 of 12
Key Features
- Cost effective version of AS1100 functionality for
applications up to 4-Digits
- 10MHz Serial Interface
- Individual LED Segment Control
- Decode/No-Decode Digit Selection
- 20µA Low-Power Shutdown (Data Retained)
- Extremely low Operating Current 0.5mA in open loop
- Digital and Analog Brightness Control
- Display Blanked on Power-Up
- Drive Common-Cathode LED Display
- Software Reset
1
- Optional External clock
- 20 pin SO Packages
General Description
The AS1105 is an LED driver for 7 segment numeric
displays of up to 4 digits. The AS1105 can be programmed
via a conventional 4 wire serial interface. It includes a BCD
code-B decoder, a multiplex scan circuitry, segment and
display drivers and a 32 Bit memory. The memory is used to
store the LED settings, so that continuous reprogramming is
not necessary.
1
Software Reset and external clock are not supported by
MAX7219
Every individual segment can be addressed and updated
separately. Only one external resistor is required to set the
current through the LED display. Brightness can be
controlled either in an analog or digital way. The user can
choose the internal code-B decoder to display numeric
digits or to address each segment directly. The AS1105
features an extremely low shutdown current of only 20µA.
and an operational current of less than 500µA. The number
of visible digits can be programmed as well. The AS1105
can be reset by software and an external clock can be used.
Several test modes support easy debugging.
AS1105 is offered in a 20 SOIC package.
Applications
- Bar-Graph Displays
- Industrial Controllers
- Panel Meters
- LED Matrix Displays
- White Goods
Serially Interfaced, 4-Digit LED Driver
AS1105
DATA SHEET
Pin Configuration
Typical Application Circuit
4-Digit µP Display
8 Segments
4 Digits
9.53k
+5V
MOSI
µP I/O
SCK
LOAD
CLK
GND
GND
DIG0-DIG3
SEG A-G
SEP DP
VDD
ISET
DIN
AS1105
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
SO
DOUT
DIN
DIG3
GND
DIG0
CLK
DIG2
DIG1
GND
LOAD
SEG D
ISET
SEG G
SEG F
VDD
SEG DP
SEG C
SEG A
SEG B
SEG E
TOP