A²SI-Lite 14 / A²SI-Lite 16
Low End Device AS-Interface IC
Features
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AS-i Complete Specification V2.11 compliant
Integrated EEPROM
Extended address mode operation as
programmable option (up to 62 slaves)
Dedicated IO-port structure: two data inputs,
two data outputs, no parameter port pins
Optional PWM outputs
Integrated watchdog
Temperature range -25°C to + 85°C
Description
A²SI-Lite (A²SI-L) is a monolithic CMOS integrated
circuit certified for AS-i (Actuator Sensor-interface)
networks. AS-i networks are intended for industrial
automation. This integrated circuit is dedicated to
be used as simplified interface IC for key control
panels, simple sensors and small actuators.
The main advantage of AS-i solutions is that
actuators and sensors are connected using a two-
wire unshielded cable that is easy to install. This
cable transports both power and information/data.
AS-i network communication is based on the
master-slave principle. The network can be
extended (to cable lengths greater than 100m) by
using the A²SI or A²SI-E in the repeater mode
configuration.
AS-i is a standard for the automation industry based
on IEC 62026-2 and EN 50295.
The device is available in a 14 and 16-pin SOP (150
mils) package.
Block Diagram
10uF
100nF
16MHz
VIN
OSC1
OSC2
Slave electronics
supply voltage
18 mH
CAP
1uF
100nF
5V
Power
Supply
Power on
Reset
Oscillator
ASI-SW
A²SI-L
Pulse
Width
Modulation
ASI +
ASIP
Receiver
DIGITAL
LOGIC
ASI -
ASIN
Output
Stages
DO0
DO1
DI2
DI3
Trans-
mitter
Two outputs, e.g.
interconnced to push
button LEDs
Two inputs, e.g.
interconnced to push
button contacts
0V
UART
State Machine
Ports
Input
Stages
Thermal
Protection
EEPROM
GND
TEST1
TEST2
Copyright © 2005 ZMD AG Rev. 2.0
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The
Information furnished in this publication is preliminary and subject to changes without notice.
ZMD [ Zentrum Mikroelektronik Dresden AG ]
