1EDI2004AS Просмотр технического описания (PDF) - Infineon Technologies

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1EDI2004AS

High Voltage IGBT Driver for Automotive Applications

Infineon Technologies 

EiceDRIVERTM SIL

1EDI2004AS

Functional Description

2.4.4.2 General Operation

The SPI interface of the 1EDI2004AS supports full duplex operation. The interface relies on four

communication signals:

• NCS: (Not) Chip Select.

• SCLK: Serial Clock.

• SDI: Serial Data In.

• SDO: Serial Data Out.

The SPI interface of the 1EDI2004AS supports slave operation only. An SPI master (typically, the main

microcontroller) is connected to one or several 1EDI2004AS devices, forming an SPI bus. Several bus

topologies are supported.

A regular SPI bus topology can be used where each of the slaves is controlled by an individual chip select signal

(Figure 6). In this case, the number of slaves on the bus is only limited by the application’s constraints.

SCLK

Master SDO

SDI

NCS1

NCS2

NCSn

SCLK

SDI Slave 1

SDO

NCS

SCLK

SDI Slave 2

SDO

NCS

Figure 6 SPI Regular Bus Topology

SCLK

SDI Slave n

SDO

NCS

In order to simplify the layout of the PCB and to reduce the number of pins used on the microcontroller’s side,

a daisy chain topology can also be used. The chain’s depth is not limited by the 1EDI2004AS itself. A possible

topology is shown Figure 7.

Data Sheet

22

Rev. 2.0

2019-01-16

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