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Download MCF5485 Reference Manual - Freescale Semiconductor
Transcript
Control IRQ or DMA Request Serial Buffers Tx Rx Tx Shifter Data Rx Shifter Transparent to User • 16 Transmit/Receive • Message Buffers • • • • Buffer 0 • Data Buffer 13 Data Buffer 14 ID Data Length Data Buffer 15 Time Stamp Data Length Data ID Time Stamp Data Length ID Time Stamp Mask 14 Mask 15 •• • • • • • ID Global Mask Figure 21-2. FlexCAN Message Buffer Architecture 21.1.2 The CAN System A typical CAN system is shown below in Figure 21-3. CAN Station 1 CAN Station 2 CAN Station n MCF548x FlexCAN CANTXn CANRXn Transceiver CAN Bus Figure 21-3. Typical CAN System Each CAN station is connected physically to the CAN bus through a transceiver. The transceiver provides the transmit drive, waveshaping, and receive/compare functions required for communicating on the CAN MCF548x Reference Manual, Rev. 5 21-2 Freescale Semiconductor
