ASI4U datasheet(34/64 Pages) ETC2

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ASI4U / ASI4U-E / ASI4U-F

Spec. 3.0 Compliant Universal AS-I IC

Data Sheet

April 2, 2012

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

34 of 63

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

Master Mode

Repeater Mode

Monitor Mode

Receive Clock

Hi-Z

Receive Clock

Power Fail

Hi-Z

Power Fail

Receive Strobe – Slave Telegram

Hi-Z

Receive Strobe – Slave Telegram

Hi-Z

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

resulting signal pulse width depends on the external pull-up resistor and the load circuit.

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