ISO 20794-2-2020 pdf free.Road vehicles — Clock extensionperipheral interface (CXPI).
This document describes the application layer protocol including the application measurement andcontrol data management, message transfer and fault management.The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO/IEC 7498-1, Information technology — Open Systems lnterconnection —Basic Reference Model: TheBasic Model
ISO 20794-3,Road vehicles – Clock extension peripheral interface (CXPI) — Part 3:Transport layer andnetwork layer
ISO 20794-4,Road vehicles — Clock extension peripheral interface (CXPI) — Part 4: Data link layer andphysical layer
For the purposes of this document, the terms and definitions given in ISo 20794-3,ISO 20794-4,ISO/IEC7498-1, and the following apply.
clock master node that transmits clock ( 3.4) to the lower OSI layers (3.2)
lower OSI layer below the application layer
master node node that provides the schedule (3.10) master management (including polling method), the primaryclock (3.6), and optionally the sleep message transmission management.clock pulse that synchronises all nodes.
normal state state which enables transmission and reception of messages.
primary clock clock(3.4) that is provided by the master node (3.3)
publisher node providing a message response containing application measurement and/or control data.
request identifierReqId parameter that requests dedicated measurement and/or control data.
request type identifierReqTypeld parameter that enables the polling method for dedicated measurement data and/or control data.
time that the master node requests the clock to the lower OSl layers at the latesttime that the master node stops to request the clock after master node receives thesleep message notification.
judgment time of the CXPl network error time that each slave node transits to sleep state after the node receives the sleepmessage notification.
minimum time that master node starts the request of any request field first for thewake-up sequence.
time that slave node starts the request of the second wake-up pulse after request ofthe first wake-up pulse.
maximum time until the slave node wakes up by the wake-up sequence.
maximum time until master node starts the request of any request field (Reqld) orrequest field (ReqTypeld) first for the wake-up sequence.ISO 20794 pdf download.