SAP5SD-A-G1-T Datasheet, PDF (18/63 Pages) List of Unclassifed Manufacturers – Universal Actuator-Sensor Interface IC

SAP5S / SAP51
Universal Actuator-Sensor Interface IC
implemented that observes the state of I2 bit. The watchdog can be activated or deactivated by E²RPOM
setting. It provides a watchdog filter time of about 327ms.
The multiplexed transfer of course increases the refresh time per output by a factor of two, however, some
applications can tolerate this increase for the benefit of less external circuitry and better slave address
efficiency. The sampling cycle of the data inputs remains unchanged since the meaning of I3 bit was not
changed in the slave response with the definition of the Extended Address Mode.
More detailed information is described in chapter 4.8.4.
2.3.8. AS-i Safety Mode
Using the SAP5 Safety Mode makes it easy to implement a safety-related AS-i slave according to the AS-i
Safety at Work concept. Slaves complying with the control category 4 according to EN 954 –1 can be
implemented even with a minimum of external circuitry.
In Safety Mode the respond of the SAP5 IC on a Data_Exchange master call (DEXG) is different. Instead of
responding the regular input data provided at the data ports, a 4-bit data word from a specific 8*4 bit code
table is transmitted to the master. Cycling the code table is used to transmit another data word with each
DEXG master call. The data transmission is supervised by a Safety Monitor.
In Safety Mode the use of the enhanced data input features described above is disabled. In this case the
safety mode related inputs act as 3-level inputs. See chapter 4.18 for further details.
2.3.9. Enhanced LED Status Indication
The SAP5 IC supports status indication by two LED outputs. More detailed information on the signaling
scheme can be found in chapter 4.11.
2.3.10. Communication Monitor/Watchdog
Data and Parameter communication are continuously observed by a communication monitor. If neither
Data_Exchange nor Write_Parameter calls were addressed to and received by the IC within a time frame of
about 41ms, a so called No Data/Parameter Exchange status is detected and signaled at LED1.
If the respective flags are set in the E²PROM the communication monitor can also act as communication
watchdog, that initiates a complete IC reset after expiring of the watchdog timer. The watchdog mode can also
be activated and deactivated by a signal at parameter port pin P0. For more detailed information see chapter
4.17.
2.3.11. Write protection of ID_Code_Extension_1
As defined in AS-i Complete Specification v3.0 the SAP5 also supports write protection for ID_Code_Exten-
sion_1. The feature allows the activation of new manufacturer protected slave profiles and is enabled by
E²PROM setting. It is described in more detail in chapter 4.20.
Data Sheet
July 17, 2012
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 3.1
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.
18 of 62