ZENTRUM MIKROELEKTRONIK DRESDEN AG
“ASI for you” IC
Datasheet
3.6.4 Master-, Repeater-, Monitor Mode
In Master-, Repeater- and Monitor Mode the Parameter Port is differently configured than in Slave Mode. The
pins serve as output channels for additional support signals or become set to high impedance state. There is no
input function associated with the Parameter Port pins.
Following support signals are provided at the Parameter Port in Master-, Repeater- and Monitor-Mode.
Table 17: Parameter Port output signals in Master-, Repeater-, Monitor-Mode
Pin
P0
P1
P2
P3
Master Mode
Repeater Mode
Monitor Mode
Receive Clock
Power Fail
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Receive Clock
Power Fail
Receive Strobe – Slave Telegram
Hi-Z
Receive Strobe – Slave Telegram
Receive Strobe – Master Telegram
Receive Clock is provided to simplify external processing of Manchester-II-coded output data at LED1 pin. The
availability of a new AS-i telegram bit at LED1 is signaled by a rising edge of receive clock so that the received
data can simply be clocked into a shift register. The output signal is active high.
Power Fail signals a breakdown of the AS-i supply voltage. The output signal is active high. Further information
regarding the Power Fail function refer to chapter 3.8 Fault Indication Input Pin FID.
Receive Strobe – Slave Telegram is generated after every correctly received AS-i slave telegram. The output
signal is active high.
Receive Strobe – Master Telegram is generated after every correctly received AS-i master telegram. The output
signal is active high.
The generated pulse width is 1.0µs for both Receive Strobe signals at the output drivers (Hi-Z time). The result-
ing signal pulse width depends on the external pull-up resistor and the load circuit.
Copyright © 2006, ZMD AG, Rev.1.4
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.
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