MCF5253 Reference Manual, Rev. 1
Freescale Semiconductor
25-1
Chapter 25
FlexCAN Module
This chapter discusses the modes of operation, signals, memory map, register descriptions, and the
functional and initialization sequence of the FlexCAN controller of the MCF5253.
25.1
Features
Following are the main features of the FlexCAN module:
•
Full implementation of the CAN protocol specification version 2.0B
— Standard data and remote frames (up to 109 bits long)
— Extended data and remote frames (up to 127 bits long)
— 0–8 bytes data length
— Programmable bit rate up to 1 Mbps
— Content-related addressing
•
Up to 32 flexible message buffers of zero to eight bytes data length, each configurable as Rx or Tx,
all supporting standard and extended messages
•
Listen-only mode capability
•
Three programmable mask registers: global (for MBs 0–13 and 16–31), special for MB14, and
special for MB15
•
Programmable transmission priority scheme: lowest ID or lowest buffer number
•
Time stamp based on 16-bit, free-running timer
•
Global network time, synchronized by a specific message
•
Programmable I/O modes
•
Maskable interrupts
•
Independent of the transmission medium (an external transceiver is assumed)
•
Open network architecture
•
Multimaster bus
•
High immunity to EMI
•
Short latency time due to an arbitration scheme for high-priority messages
25.2
Block Diagram
A block diagram describing the various submodules of the FlexCAN module is shown in
.
Each submodule is described in detail in subsequent sections. The message buffer architecture is shown in
.
Summary of Contents for MCF5253
Page 1: ...Document Number MCF5253RM Rev 1 08 2008 MCF5253 Reference Manual...
Page 26: ...MCF5253 Reference Manual Rev 1 xxvi Freescale Semiconductor...
Page 32: ...MCF5253 Reference Manual Rev 1 xxxii Freescale Semiconductor...
Page 46: ...MCF5253 Introduction MCF5253 Reference Manual Rev 1 1 14 Freescale Semiconductor...
Page 62: ...Signal Description MCF5253 Reference Manual Rev 1 2 16 Freescale Semiconductor...
Page 98: ...Instruction Cache MCF5253 Reference Manual Rev 1 5 10 Freescale Semiconductor...
Page 104: ...Static RAM SRAM MCF5253 Reference Manual Rev 1 6 6 Freescale Semiconductor...
Page 128: ...Synchronous DRAM Controller Module MCF5253 Reference Manual Rev 1 7 24 Freescale Semiconductor...
Page 144: ...Bus Operation MCF5253 Reference Manual Rev 1 8 16 Freescale Semiconductor...
Page 176: ...System Integration Module SIM MCF5253 Reference Manual Rev 1 9 32 Freescale Semiconductor...
Page 198: ...Analog to Digital Converter ADC MCF5253 Reference Manual Rev 1 12 6 Freescale Semiconductor...
Page 246: ...DMA Controller MCF5253 Reference Manual Rev 1 14 18 Freescale Semiconductor...
Page 282: ...UART Modules MCF5253 Reference Manual Rev 1 15 36 Freescale Semiconductor...
Page 344: ...Audio Interface Module AIM MCF5253 Reference Manual Rev 1 17 46 Freescale Semiconductor...
Page 362: ...I2 C Modules MCF5253 Reference Manual Rev 1 18 18 Freescale Semiconductor...
Page 370: ...Boot ROM MCF5253 Reference Manual Rev 1 19 8 Freescale Semiconductor...