A2SI-ST

A²SI Release Notes, IC Revision C Technical Upgrades in A²SI Revision C Effected part of the A²SI UART Telegram Checker Description of modification The telegram reception under worst case capacitive and worst case inductive network conditions was improved in response to suggestions of the technical committee of the AS-International Association. The digital MAN-code communication channel does now support a more cost effective two-wire data transfer between the A²SI and the master control logic. It is not necessary to rely on the additional ‘Receive_Strobe’ signal, which is supplied at the parameter port P2 in Master Mode to verify the correctness of the MAN output signal at the LED port. The MAN signal is now distinctively disturbed if an erroneous telegram was detected at the AS-i input. This allows to spare at least one opto coupler in between the A²SI and the master control. If running, the communication watchdog will now become turned off as soon as the volatile slave address register is changed to zero (0x0). This occurs after the reception of a Delete_Address call or at a reset of the A²SI. In all previous revisions, a running communication watchdog could only be turned off by a reset of the A²SI (reception of Reset_Slave call or external reset). In case the watchdog was running and a master did not submit a Reset_Slave call prior to an address assignment, the write access to the non-volatile E²PROM memory could have been interrupted. Because a data corruption is likely in such an event, the A²SI resumed to the fail save state of slave address zero (0x0) and did not respond to the newly assigned address until the address assignment call was repeated. The loop gain of the oscillator was increased to support a broader variety of 8MHz crystals. Description of modification It appeared the infrared input channel (IRD) was sensitive against coupled noise in some application circuits. In order to make the photo current input more robust for a broad variety of designs, the analog receiver circuit had been changed. This resulted in a much better performance in terms of noise sensitivity but required a slightly lower signal sensitivity as well. See the updated Data Sheet for more information. UART Master Mode Main State Machine Slave Mode Communication Watchdog Oscillator Effected part of the A²SI Infrared input channel Slave Mode Release Notes, A²SI Revision C, August 28, 2002 ZMD AG 1/4 A²SI Release Notes, IC Revision C The replacement of A²SI Revision B with Revision C neither has any impact to required external components nor requires a change of the external circuitry. The CAP-Pin of an IC of Revision C shall be connected to a series of one capacitor and one resistor, in the same manner like on Revision B. Suggested values are C=4.7nF, R=430…680 Ohms. See the Data Sheet and the Application Notes for more detailed information. Package Marking TOP VIEW BOTTOM VIEW A2SI ZMD + C-XXXXYZZ LLLLLL PIN 1 PIN 1 Figure 1: Package Marking Top Marking: A²SI Product name ZMD CXXXX Y ZZ LLLLLL Manufacturer Revision code marking of A²SI Revision C Date code (year and week) Assembly location Traceability ZMD Lot Number Bottom Marking: The yellow dot indicating pre-programmed Master function is printed at the pin 1 marking ⊕. Note: IC Revision A did not have a revision code marking. ICs without a Revision Code are equivalent to Revision A. Revision B shows “B-“ . Release Notes, A²SI Revision C, August 28, 2002 ZMD AG 2/4 A²SI Release Notes, IC Revision C Ordering Information Ordering Code A2SI-ST Description Operating Temperature Range -25°C to 85°C Package Type Device Marking A²SI Shipping Form Standard version of A²SI Standard version of A²SI Pre-programmed master function Pre-programmed master function 28-pin SSOP Tubes (47 parts/tube) Tape-and-Reel (1500 parts/reel) Tubes (47 parts/tube) Tape-and-Reel (1500 parts/reel) A2SI-SR -25°C to 85°C 28-pin SSOP A²SI A2SI-MT -25°C to 85°C 28-pin SSOP A²SI + yellow dot A²SI + yellow dot A2SI-MR -25°C to 85°C 28-pin SSOP Sales Contacts Sales Office Dresden Zentrum Mikroelektronik Dresden AG Grenzstraße 28 D-01109 Dresden Germany Phone +49-351-8822-310 Fax +49-351-8822-337 sales@zmd.de Sales Office Long Island ZMD America Inc. 201 Old Country Road Melville, NY 11747 USA Phone +1-631-549-2666 Fax +1-631-549-2882 info@zmda.com Engineering Support Design Office Dresden Zentrum Mikroelektronik Dresden AG Bertolt-Brecht-Allee 22 D-01309 Dresden Germany Phone +49-351-31530-86 Fax +49-351-31530-11 asi@zmd.de Release Notes, A²SI Revision C, August 28, 2002 ZMD AG 3/4 A²SI Release Notes, IC Revision C Trademark: A²SI™ is a trademark of AMI Semiconductor, Inc. Life Support Policy ZMD products are not designed, intended, or authorised for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the ZMD product could create a situation where personal injury or death may occur. Components used in life-support devices or systems must be expressly authorised by ZMD for such purpose. Limited Warranty The information in this document has been carefully checked and is believed to be reliable. However Zentrum Mikroelektronik Dresden (ZMD) makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon it. The information in this document describes the type of component and shall not be considered as assured characteristics. ZMD does not guarantee that the use of any information contained herein will not infringe the patent, trademark, copyright, mask work right or other rights of third parties, and no patent or licence is implied hereby. This document does not in any way extent ZMDs warranty on any product beyond that set forth in its standard terms and conditions of sale. ZMD reserves terms of delivery and reserves the right to make changes in the products or specifications, or both, presented in this publication at any time and without notice. © 2002 Zentrum Mikroelektronik Dresden AG. All rights reserved. Release Notes, A²SI Revision C, August 28, 2002 ZMD AG 4/4