ASI4U Evaluation Board Application Note 2 ASI4U 1 AS-interface Features Actuator-Sensor Interface (AS-i) is the simplest automation networking solution. ASI4U is a monolithic CMOS integrated circuit AS-Interface is the ideal choice for certified for AS-i (Actuator Sensor Interface) networking sensors and actuators in networks. factory automation and process control environments. ASI4U is a pin compatible successor of the ASI integrated circuit. It is especially suitable for lower levels of plant automation where simple field devices, such as switches, need to communicate in a stand-alone local area automation network controlled by PLC or PC. AS-Interface is an open worldwide Complete Specification V3.0 compliant industry standard, IEC 62026-2 and EN 50295 (EU). 3 ASI4U Evaluation Board Features The ASI4U Evaluation Board demonstrates the integration of the ASI4U IC in an application specific design case. This evaluation board helps to reduce development effort and development time for ASI4U application projects. It demonstrates an IC reference design, illustrates simple application circuits and deals with recommendations concerning necessary external components and PCB design issues. Figure 1: ASI4U Evaluation Board Hardware Ordering name: ASI4U Evaluation Board V2.0 Ordering code: 3600100143 Application support is available through the e-mail hotline asi zmd.de Rev. 1.0, Copyright 2006, ZMD AG 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. 1/28 ASI4U Evaluation Board Application Note Document Content 1 AS-INTERFACE FEATURES .....................................................................................................................1 2 ASI4U ..........................................................................................................................................................1 3 ASI4U EVALUATION BOARD FEATURES...............................................................................................1 4 REFERENCES............................................................................................................................................3 5 SCOPE ........................................................................................................................................................3 6 ASI4U EVALUATION BOARD APPLICATION MODES ...........................................................................4 6.1 STANDARD APPLICATION WITH INTERNAL ELECTRONIC INDUCTOR ..............................................4 6.1 STANDARD APPLICATION WITH EXTERNAL INDUCTOR................................................................................5 6.2 ISOLATED TRANSMITTER MODE FOR HIGH SYMMETRICAL APPLICATIONS ...................................................7 6.3 COMPLETE SCHEMATIC DIAGRAM..........................................................................................................10 6.4 COMPLETE COMPONENT PLACEMENT SPECIFICATION ............................................................................10 7 ASI4U CONFIGURATION ........................................................................................................................12 7.1 INTERNAL EEPROM ............................................................................................................................12 7.1.1 General Information ....................................................................................................................12 7.1.2 EEPROM Content.......................................................................................................................12 7.1.3 EEPROM User Area Write Access.............................................................................................14 7.1.4 EEPROM Firmware Area Write Access......................................................................................14 7.1.5 Recommended EEPROM Access Procedures in Program Mode..............................................14 7.1.6 EEPROM Configuration Tool......................................................................................................16 7.2 OPERATION MODES..............................................................................................................................17 7.2.1 Overview .....................................................................................................................................17 6.1.2 Regular Slave Operation ............................................................................................................17 7.2.2 Master-, Repeater-, Monitor Mode..............................................................................................18 7.2.3 Safety Mode................................................................................................................................18 7.2.4 ASI Compatibility Mode .............................................................................................................19 7.3 AS-I CHANNEL SELECTION....................................................................................................................19 7.3.1 AS-i channel................................................................................................................................19 7.3.2 Infrared channel ..........................................................................................................................20 7.3.3 CMOS Channel...........................................................................................................................20 8 APPLICATION INFO ................................................................................................................................21 8.1. PIN DESCRIPTION .................................................................................................................................21 8.2. EXTERNAL COMPONENTS......................................................................................................................22 8.3. CRITICAL PARASITIC LOADS ..................................................................................................................24 8.4. PCB DESIGN RECOMMENDATIONS ........................................................................................................24 9 CONTACT INFORMATION ......................................................................................................................26 9.1 ZMD SALES.........................................................................................................................................26 9.2 ZMD AS-INTERFACE APPLICATION SUPPORT ........................................................................................26 9.3 ZMD DISTRIBUTION PARTNERS.............................................................................................................26 9.4 AS-INTERNATIONAL ASSOCIATION .........................................................................................................27 Rev. 1.0, Copyright 2006, ZMD AG 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. 2/28