ASI4UC-G1-SR-7 ZMDI, ASI4UC-G1-SR-7 Datasheet - Page 33

• Manufacturer Part Number: ASI4UC-G1-SR-7
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of ASI4UC-G1-SR-7

• Product Category: Interface - Specialized
• Rohs: yes
• Product Type: Actuator Sensor Interface IC
• Operating Supply Voltage: 16 V to 33.1 V
• Supply Current: 6 mA
• Maximum Power Dissipation: 850 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Minimum Operating Temperature: - 25 C

3.6.2.
AS-i Complete Specification v3.0 defines a so called Parameter Multiplex Mode. This new feature allows bi-
directional data transfer through the parameter port. The bi-directionality is achieved by turning the Parameter
Output Drivers off after the Parameter Strobe period and before the input sampling event. By turning off its
output drivers during the Parameter Strobe pulse, an external microcontroller can read the data from the
Parameter Port of the ASI4U, prepare new return data and place it to the port right after the Parameter Strobe
signal.
The Parameter Multiplex Mode becomes activated by setting the corresponding Multiplex_Parameter flag
(=’1’) in the E²PROM.
To keep full compatibility to A²SI based applications this flag should be kept zero (=’0’). The A²SI did not allow
real bi-directional parameter data transfer since it was not able to turn the output drivers off. The return value
to a Write_Parameter call was always a wired AND combination of the output signal of the IC and the signal
driven to the port by the external logic.
3.6.3.
In case the Watchdog_Active flag is not set (=’0’) but the P0_Watchdog_Activation flag is set (= ‘1’, Firmware
Area of the E²PROM) the value of the Parameter Port signal P0 determines whether the communication
watchdog is enabled or disabled. In compliance to Slave Profile 7D-5 the behavior is defined as follows:
If the P1_Filter_Activation flag is set in the E²PROM, the activation of the data input filters depends on the
value of the Parameter Port signal P1. Following coding applies:
For further details refer to chapter 3.7 Data Port and DSR – Input Data Pre-Processing.
If the Synchronous_Data_I/O_Mode flag is set in the E²PROM, the value of the parameter port P2 activates or
deactivates the Synchronous Data I/O Mode of the ASI4U. Following coding applies:
For further details refer to chapter 3.7 Data Port and DSR – Synchronous Data I/O Mode.
The processed values of P0, P1 and P2 result from a wired-AND combination between the corresponding
output value and the input value driven by an external signal source.
Data Sheet
January 30, 2012
ASI4U / ASI4U-E
Spec. 3.0 Com
Parameter Multiplex Mode
Special function of P0, P1 and P2
Input Value at P0 State of Communication Watchdog
Low level (=’0’)
High level (=’1’)
Input Value at P1 Data input filter function
Low level (=’0’)
High level (=’1’)
Input Value at P2 Synchronous Data I/O Mode
Low level (=’0’)
High level (=’1’)
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 2.1
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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