What is ISO 11898-2 - Controller area network (CAN) about?
ISO 11898 is a series of international standards on controller area networks that discusses the workability of high-speed medium access units. ISO 11898-2 is the second part of a series of documents on controller area networks. ISO 11898-2 specifies the high-speed physical media attachment (HS-PMA) of the controller area network (CAN), a serial communication protocol that supports distributed real-time control and multiplexing for use within road vehicles. This includes HS-PMAs without and with low-power mode capability as well as selective wake-up functionality. The physical media-dependent sublayer is not in the scope of ISO 11898-2.
Who is ISO 11898-2 - Controller area network (CAN) for?
ISO 11898-2 on controller area network is relevant:
- Automotive industry
Why should you use ISO 11898-2 - Controller area network (CAN)?
The Controller Area Network (CAN) is another type of serial communications protocol that was developed within the automotive industry to allow a number of electronic units on a single vehicle to share essential control data. A vehicle nowadays uses many microcontrollers for autonomous control systems.
ISO 11898-2 provides guidance on symbols and abbreviated terms, functional description of the HS-PMA, ECU and network design, pn physical layer modes.
As a user of ISO 11898-2, you can be ensured of high-speed physical media attachment. With obedience and compliance to ISO 11898-2, you can efficiently have fast communication among microcontrollers up to real-time requirements, eliminating the need for the much more expensive and complex technology.
What’s changed since the last update?
BS ISO 11898-2:2016 cancels and replaces the first edition (ISO 11898-2:2003), which has been technically revised, with the following changes:
- Max output current on CANH/CANL has been defined (Table 4)
- Optional TXD timeout has been defined (Table 7)
- Receiver input resistance range has been changed (Table 10)
- Bit timing parameters for CAN FD for up to 2 Mbps have been defined (Table 13)
- Bit timing parameters for CAN FD for up to 5 Mbps have been defined (Table 14)
- Content of ISO 11898-5 and ISO 11898-6 has been integrated to ensure there is one single ISO Standard for all HS-PMA implementations
- Selective wake-up (formerly ISO 11898-6) CAN FD tolerance has been defined
- Wake-filter timings (formerly in ISO 11898-5) have been changed (Table 20)
- Requirements and assumptions about the PMD sublayer have been shifted to Annex A, to clearly focus on the HS-PMA implementation