ZSSC3170 Datasheet

© 2016 Integrated Device Technology, Inc.

21

May 30, 2016

2.6.2

LIN Output

The output of the integrated LIN transceiver at the LIN pin is compatible with the LIN revisions 2.1, 2.0 and 1.3.

For details, refer to the ZSSC3170 LIN Interface Description. For LIN Physical Layer Conformance Tests, the

control pins of the integrated LIN transceiver can be accessed separately in a LIN Conformance Test Mode.

2.7

Digital Test and Calibration Interface

Beyond the digital communication features accessed via the output pins, the ZSSC3170 provides an I

patible test and calibration interface with slave functionality. For a detailed description of the I

to the ZSSC3170 Functional Description.

2.8

Diagnostic and Failsafe Features, Watchdog, and Error Detection

The ZSSC3170 detects various possible failures. An identified failure is indicated by the ZSSC3170 entering the

Diagnostic Mode (DM). With PWM active, the respective output is switched to the resistive mode. In LIN Mode,

depending on the error classification, the correlated status bits are activated. A watchdog continuously monitors

the operations of the CMC and the running measurement loop. The operation of the internal clock oscillator is

monitored by the oscillator failure detection. A check of the sensor bridge for broken or shorted wires is performed

continuously (the sensor connection check (SCC) and the sensor short check (SSC). In PWM Mode with Low-

Side Switch (LSS) and PWM Mode with High-Side Switch (HSS), the diagnosis functions SCC and SSC are only

available from ZSSC3170 silicon

revision “F” and any subsequent revisions. The common mode voltage of the

sensor (CMV) is monitored continuously (sensor aging check (SAC)). A check for a broken chip (BCC) can be

applied in the start-up phase after power-on. RAM, ROM, EEPROM, registers, and the arithmetic unit are

monitored continuously. Refer to the ZSSC3170 Functional Description for a detailed description.

2.9

High Voltage, Reverse Polarity, and Short Circuit Protection

The ZSSC3170 is designed for a direct 12V supply, which can be provided by a vehicle power system. Internal

sub-assemblies are supplied and protected by integrated voltage regulators and limiters. Specific protection

circuits allow tolerance of permanent reverse polarity at supply and output pins. These functions are described in

detail in the document ZSSC3170 High Voltage Protection Description. When operated in the application circuits

shown in section 3, the protection features of the ZSSC3170 are guaranteed without time limit.