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XC888LM Datasheet(PDF) 104 Page - Infineon Technologies AG |
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XC888LM Datasheet(HTML) 104 Page - Infineon Technologies AG |
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104 / 144 page  XC886/888CLM Functional Description Data Sheet 97 V0.9, 2006-12 3.20 Controller Area Network (MultiCAN) The MultiCAN module contains two Full-CAN nodes operating independently or exchanging data and remote frames via a gateway function. Transmission and reception of CAN frames is handled in accordance to CAN specification V2.0 B active. Each CAN node can receive and transmit standard frames with 11-bit identifiers as well as extended frames with 29-bit identifiers. Both CAN nodes share a common set of message objects, where each message object may be individually allocated to one of the CAN nodes. Besides serving as a storage container for incoming and outgoing frames, message objects may be combined to build gateways between the CAN nodes or to setup a FIFO buffer. The message objects are organized in double chained lists, where each CAN node has it’s own list of message objects. A CAN node stores frames only into message objects that are allocated to the list of the CAN node. It only transmits messages from objects of this list. A powerful, command driven list controller performs all list operations. The bit timings for the CAN nodes are derived from the peripheral clock ( f CAN) and are programmable up to a data rate of 1 MBaud. A pair of receive and transmit pins connects each CAN node to a bus transceiver. Figure 34 Overview of the MultiCAN Features • Compliant to ISO 11898. MultiCANModule Kernel MultiCAN_XC8_overview Port Control CAN Node 0 CANControl Message Object Buffer 32 Objects CAN Node 1 TXDC0 RXDC0 TXDC1 RXDC1 Linked List Control f CAN Clock Control Address Decoder & Data control Access Mediator Interrupt Controller CANSRC[7:0] A[13: 2] D[31:0] |
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