MAC7200 datasheet(585/976 Pages) FREESCALE

585 / 976 page

The Generic FlexCAN2 Module

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

507

establish connection to the CPU and to other blocks. Clocks, address and data buses, interrupt outputs and

test signals are accessed through the Bus Interface Unit.

28.2.3

Features

The FlexCAN module includes these distinctive features:

•

Full Implementation of the CAN protocol specification, Version 2.0B

— Standard data and remote frames

— Extended data and remote frames

— Zero to eight bytes data length

— Programmable bit rate up to 1 Mb/sec

— Content-related addressing

•

Flexible Message Buffers (up to 64) of zero to eight bytes data length

•

Each MB configurable as Rx or Tx, all supporting standard and extended messages

•

Individual Rx Mask Registers per Message Buffer

•

Includes either 1056 bytes (64 MBs), 544 bytes (32 MBs) or 288 bytes (16 MBs) of RAM used for

MB storage

•

Includes either 256 bytes (64 MBs), 128 bytes (32 MBs) or 64 bytes (16 MBs) of RAM used for

individual Rx Mask Registers

•

Reception queue possible by setting more than one Rx Message Buffer with the same ID

•

Single-bit selectable backwards compatibility with previous FlexCAN version

•

Programmable clock source to the CAN Protocol Interface, either bus clock or crystal oscillator

•

Unused MB and Rx Mask Register space can be used as general purpose RAM space

•

Listen only mode capability

•

Programmable loop-back mode supporting self-test operation

•

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

•

Maskable interrupts

•

Independent of the transmission medium (an external transceiver is assumed)

•

Short latency time due to an arbitration scheme for high-priority messages

•

Low power modes, with programmable wake up on bus activity

NOTE

The individual Rx Mask per Message Buffer feature may not be available in

low cost MCUs. Please consult the specific MCU documentation to find out

if this feature is supported.

MAC7200 Datasheet(PDF) 585 Page - Freescale Semiconductor, Inc

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