ZSSC3170 Datasheet, PDF (18/30 Pages) List of Unclassifed Manufacturers – Automotive Sensor Signal Conditioner with LIN and PWM Interface

ZSSC3170 Datasheet
2.5 System Control and Conditioning Calculation
The system control performs the following tasks:
 Sequencing of the start-up phase
 Control of measurement cycle based on EEPROM configuration data
 16-bit conditioning calculation for each measurement signal based on EEPROM conditioning coefficients
and ROM-resident signal conditioning algorithm
 Processing of communication requests received at the serial interfaces
 Control of calibration mode
 Processing of diagnostic and failsafe tasks
For a detailed description, refer to the ZSSC3170 Functional Description.
2.5.1 Operating Modes
Three main modes are implemented in the integrated state machine:
 Normal Operation Mode (NOM) with continuous signal conditioning
 Command Mode (CM), which provides access to all internal registers and provides the basis for
configuration and calibration of the ZSSC3170
 Diagnostic Mode (DM), which indicates detected error conditions
2.5.2 Start-Up Phase
The start-up phase consists of the following time periods:
 Settling of the internal voltage supply represented by the voltage VDDA-VSSA. At the end of this period,
the power-on-reset circuit (POR) switches off the reset signal.
 System start, readout of EEPROM, and signature check.
 Processing of the signal conditioning start routine containing bridge sensor signal and temperature
measurements, associated auto-zero measurements, and the conditioning calculation itself. Within this
period, the output pins are ready to receive special LIN frames resulting in entering the Command Mode
(CM). This start window is active for up to 30ms.
The ZSSC3170 switches into Normal Operation Mode (NOM) after the start window is passed. It proceeds with
the cyclic processing of the measurement and conditioning tasks.
© 2016 Integrated Device Technology, Inc.
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May 30, 2016