Transcription of A CAN Physical Layer Discussion
{{id}} {{{paragraph}}}
Example: bankruptcy
A CAN Physical Layer Discussion
2002 Microchip Technology 1 MAN228 INTRODUCTIONMany network protocols are described using the sevenlayer Open System Interconnection (OSI) model, asshown in Figure 1. The Controller Area Network (CAN)protocol defines the Data Link Layer and part of thePhysical Layer in the OSI model. The remaining physi-cal Layer (and all of the higher layers) are not defined bythe CAN specification. These other layers can either bedefined by the system designer, or they can be imple-mented using existing non-proprietary Higher LayerProtocols (HLPs) and Physical Data Link Layer is defined by the CAN specifica-tion. The Logical Link Control (LLC) manages the over-load control and notification, message filtering andrecovery management functions. The Medium AccessControl (MAC) performs the data encapsulation/decap-sulation, error detection and control, bit stuffing/de-stuffing and the serialization and Physical Medium Attachment (PMA) and MediumDependent Interface (MDI) are the two parts of thephysical Layer which are not defined by CAN.
DC Voltage on CANH and CANL -3 +32 -40 +40 V Exceeds ISO-11898 ... switched off and the receiver operates in a reduced power mode. While the receive pin (RXD) is still functional, it will operate at a slower rate. ... CANL pins remain in the high impedance state until VDD). High.
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: