ZSC31010

Data Sheet

May 25, 2011

© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 2.8

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 subject to changes without notice.

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3

Functional Description

3.1.

General Working Mode

The command/data transfer takes place via the one-wire Sig™ pin, using the ZACwire™ serial communication

protocol. After power-on, the IC waits for 6 ms (i.e., the command window) for the Start_CM command. Without

this command, the Normal Operation Mode (NOM) starts. In this mode, raw bridge values are converted, and the

corrected values are presented on the output in analog or digital format (depending on the configuration stored in

EEPROM).

Command Mode (CM) can only be entered during the 6 ms command window after power-on. If the IC receives

the Start_CM command during the command window, it remains in the Command Mode. The CM allows changing

to one of the other modes via command. After command Start_RM, the IC is in the Raw Mode (RM). Without

correction, the raw values are transmitted to the digital output in a predefined order. The RM can only be stopped

by power-off. Raw Mode is used by the calibration software for collection of raw bridge and temperature data, so

the correction coefficients can be calculated.

Figure 3.1

General Working Mode