AS1100 Datasheet, PDF (1/12 Pages) ams AG – Serially Interfaced, 8-Digit LED Driver

Data Sheet AS1100
Serially Interfaced, 8-Digit LED Driver
AS1100
DATA SHEET
Key Features
- 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 Reset¹
- Optional External clock
- 24-Pin DIP and SO Packages
- Fully compatible to MAX7219
General Description
The AS1100 is an LED driver for 7 segment numeric
displays of up to 8 digits. The AS1100 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 64 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 AS1100
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 AS1100
can be reset by software and an external clock can be used.
Several test modes support easy debugging.
The AS1100 is fully compatible to the MAX 7219. AS1100 is
offered in a 24 pins PDIP and SOIC package.
Applications
- Bar-Graph Displays
- Industrial Controllers
- Panel Meters
- LED Matrix Displays
- White Goods
TOP
DIN 1
DIG0 ²
DIG4 ³
GND ⁴
DIG6 ⁵
DIG2 6
DIG3 ⁷
DIG7 ⁸
GND ⁹
DIG5 10
DIG1 ¹¹
LOAD ¹²
24 DOUT
23 _{SEG D}
22 _{SEG DP}
21 SEG E
20 SEG C
19 _VDD
AS1100 _{18 ISET}
17 _{SEG G}
16 _{SEG B}
15 _{SEG F}
14 _{SEG A}
13 _CLK
DIP/SO 24
Pin Configuration
1 _{Software Reset and external clock are not supported by}
MAX7219
9.53k
MOSI
µP I/O
SCK
+5V
19
VDD
18 _{ISET DIG0-DIG7}
1 _DIN
8 Digits
12 _LOAD
1
9
CLK
SEG A-G
SEP DP
GND _GND
8 Segments
4
8-Digit µP Display
Typical Application Circuit
Revision 1.32, Oct. 2004
Page 1 of 12