hello, interfaces

Automotive Interfaces -
Data transfer via CAN, USB,
Ethernet, FlexRay, LIN etc.


hello, automotive industry

Interfaces for reliable and fast
data transfer

Automotive interfaces definition

Automotive interfaces are connections which are commonely used in the automotive industry. They enable the data transfer between two electronic devices and thus secure the control, supervision and communication of the subsystems in the vehicle. Since they represent a connection between physical systems, they belong to the family of hardware interfaces.



Automotive interfaces - Overview

CAN (Controller Area Network)

Different to other serial fieldbuses CAN is not based on the Master-Slave principle. The communication partners are therefore equal. The data exchange itself takes place via a twisted two-wire line. CAN distinguishes itself among others by a high error safety, low costs and real-time functionality.

CAN FD (Controller Area Network Flexible Data rate)

The extension of the common CAN interface enables an increased data transmission rate as well as the dispatch of larger data sets. This covers the increasing bandwidth requirements of the automotive sector.

CAN XL (Controller Area Network XL)

The new CAN version provides the basis for efficient cooperation of IP-technologies as well as signal based communication. CAN-XL represents the fastest CAN in the data phase with scalable speeds in the area of 2 Mbyte/sec to 10 Mbyte/sec.

LIN (Local Interconnect Network)

Lin was specially developed for applications which only have to transfer small data sets. Like this, the bus system reduces costs in the area clearly. The communication works according to the master-slave principle.

Automotive Ethernet (1000BASE-T)

Also known as LAN-technology Ethernet realizes the data exchange in the form of data frames between the units connected in the local network. For applications which have high requirements regarding a reliable communication real-time Ethernet is used. BroadR-Reach represents an Ethernet-Physical-Layer-Standard which reduces connection costs and the weight of the wiring.

USB (Universal Serial Bus)

The serial architecture of USB allows data to be transmitted bit by bit, serially between devices. Like this, the error rate can be reduced and the data transmission rate increased. An additional advantage is the already integrated energy transfer through which an additional power cable is unnecessary. The interface is differentiated between USB2 and USB3 connections, which differ among other things through various data transmission rates.


Similar to CAN FD FlexRay was invented to fulfill the increased requirements of future vehicle connection. Some key features of FlexRay are higher data transmission rates, real-time functionality and increased failure safety.

MSP Family

Programmers for maximum flexibility

ProMik's MSP family supports up to 30 freely configurable I/Os and any interfaces (automotive or debugging). From CAN FD to USB up to UART the customer is given maximum flexibility during the implementation of the solutions. ProMik's programming systems are particularly designed for the automotive industry, in which not only complex requirements. but also large quantities have to be managed.

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Contact us today to receive current information about the technical background and specific use cases of our Multi Standard Programmmers.



Other important interfaces

UART (Universal Asynchronous Receiver Transmitter)

UART uses asynchronous mode - the data transfer thus works without the use of a common clock signal between transmitter and receiver.

SPI (Serial Peripheral Interface)

SPI is commonely used for the data exchange between microcontrollers and smaller peripheries like sensors or SD-cards. It represents a bus system of three lines for serial synchronous transmission.

QSPI (Quad Serial Peripheral Interface)

QSPI is an extension to the traditional SPI interface which introduces additional data lines and functionalities to enable higher data transmission rates as well as an improved performance. The programming speed amounts up to 25MHz. Thus, QSPI allows a reliable high speed communication between MCU resp. processor and the external flash memory of the application.

I2C (Inter Integrated Circuit)

I squared C is a two-wire data bus, which is ideal for short distances and low bandwidth. Like many other communication protocols the interface is based on the master-slave architecture.

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