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AS1105WL-T 参数 Datasheet PDF下载

AS1105WL-T图片预览
型号: AS1105WL-T
PDF下载: 下载PDF文件 查看货源
内容描述: 串行接口, 4位LED驱动器 [Serially Interfaced, 4-Digit LED Driver]
分类和应用: 驱动器
文件页数/大小: 15 页 / 554 K
品牌: AMSCO [ AUSTRIAMICROSYSTEMS AG ]
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A S 11 0 5
Serially Interfaced, 4-Digit LED Driver
D a ta S he e t
1 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.
The device 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.
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-pin SOIC package.
2 Key Features
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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
Optional External clock
20-pin SOIC Package
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3 Applications
The AS1105 is an ideal solution for Bar-Graph Displays,
Industrial Controllers, Panel Meters, LED Matrix
Displays and White Goods such as washing machines,
dishwasher, etc.
Figure 1. Typical Application Circuit
+5V
9.53k
V
DD
ISET DIFG0-DIG3
4 Digits
MOSI
µP I/O
SCK
DIN
LOAD
CLK
GND
SEG A-G
SEP DP
GND
8 Segments
4-Digit µP Display
www.austriamicrosystems.com
Revision 1.34
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