SAP5SD-B-G1-R datasheet(18/63 Pages) ETC2

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SAP5S / SAP51

Universal Actuator-Sensor Interface IC

Data Sheet

July 17, 2012

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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.

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