case inductive network conditions was improved in response to
suggestions of the technical committee of the AS-International
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 pa-
rameter port P2 in Master Mode to verify the correctness of the
MAN output signal at the LED port.
telegram was detected at the AS-i input. This allows to spare at
least one opto coupler in between the A²SI and the master con-
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.
could only be turned off by a reset of the A²SI (reception of Re-
set_Slave call or external reset).
Reset_Slave call prior to an address assignment, the write ac-
cess to the non-volatile E²PROM memory could have been inter-
rupted. 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 ad-
dress assignment call was repeated.
broader variety of 8MHz crystals.
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.
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 Re-
vision B. Suggested values are C=4.7nF, R=430...680 Ohms. See the Data Sheet and the Appli-
Revision A. Revision B shows "B-" .
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A²SITM is a trademark of AMI Semiconductor, Inc.
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