1EDI2004AS datasheet(21/138 Pages) INFINEON

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Data Sheet

Rev. 2.0

2019-01-16

EiceDRIVERTM SIL

1EDI2004AS

Functional Description

2.4.4

SPI Interface

This chapter describes the functionality of the SPI block.

2.4.4.1

Overview

The standard SPI interface implemented on the 1EDI2004AS is compatible with most of the microcontrollers

available for automotive and industrial applications. The following features are supported by the SPI

interface:

• Full-duplex bidirectional communication link.

•SPI Slave mode (only).

• 16-bit frame format.

• Daisy chain capability.

•MSB first.

• Parity Check (optional) and Parity Bit generation (LSB).

The SPI interface of the 1EDI2004AS provides a standardized bidirectional communication interface to the

main microcontroller. From the architectural point of view, it fulfills the following functions:

• Initialization of the device.

• Configuration of the device (static and runtime).

• Reading of the status of the device (static and runtime).

• Operation of the verification modes of the device.

The purpose of the SPI interface is to exchange data which have relaxed timing constraints compared to the

PWM signals (from the point of view of the motor control algorithm). The IGBT switching behavior is for

example controlled directly by the PWM input. Similarly, critical application failures requiring fast reaction are

notified on the primary side via the feedback signals NFLTA, NFLTB and NRST/RDY.

In order to minimize the complexity of the end-application and to optimize the microcontroller’s resources,

the implemented interface has daisy chain capability. Several (typically 6) 1EDI2004AS devices can be

combined into a single SPI bus.

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