LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 381
LM3S8971
Manufacturer Part Number
LM3S8971
Description
Lm3s8971 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S8971.pdf
(602 pages)
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15.3
15.4
July 26, 2008
Controller Area Network Block Diagram
Figure 15-1. CAN Module Block Diagram
Controller Area Network Functional Description
The CAN module conforms to the CAN protocol version 2.0 (parts A and B). Message transfers that
include data, remote, error, and overload frames with an 11-bit identifier (standard) or a 29-bit
identifier (extended) are supported. Transfer rates can be programmed up to 1 Mbps.
The CAN module consists of three major parts:
■
■
■
The protocol controller transfers and receives the serial data from the CAN bus and passes the data
on to the message handler. The message handler then loads this information into the appropriate
message object based on the current filtering and identifiers in the message object memory. The
message handler is also responsible for generating interrupts based on events on the CAN bus.
CAN protocol controller and message handler
Message memory
CAN register interface
ABP Pins
Interface
APB
Preliminary
CANIF2CMSK
CANIF2MSK1
CANIF2MSK2
CANIF2ARB1
CANIF2ARB2
CANIF2MCTL
CANIF1CMSK
CANIF1MSK1
CANIF1MSK2
CANIF1MCTL
CANIF1ARB1
CANIF1ARB2
CANIF2CRQ
CANIF2DA1
CANIF2DA2
CANIF2DB1
CANIF2DB2
CANIF1CRQ
CANIF1DA1
CANIF1DA2
CANIF1DB1
CANIF1DB2
CANBRPE
CANSTS
CANCTL
CANTST
CANINT
CANBIT
32 Message Objects
Message RAM
CAN Core
LM3S8971 Microcontroller
CAN Tx/Rx
381
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