1EDI2001AS_15 Datasheet, PDF (23/135 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

EiceDRIVER™ SIL
1EDI2001AS
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 1EDI2001AS 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 1EDI2001AS 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) 1EDI2001AS devices can be combined into
a single SPI bus.
Datasheet
23
Hardware Description
Rev. 3.1, 2015-07-30