A2SI Datasheet | Zentrum Mikroelektronik Dresden

.. 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 mittee of the AS-International Association. The digital MAN-code munication 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 munication watchdog will now bee 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 munication 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...