LM3S5956-IQR80-C1 Datasheet, PDF (748/1144 Pages) Texas Instruments – Stellaris® LM3S5956 Microcontroller

NRND: Not recommended for new designs.
Controller Area Network (CAN) Module
16.1
16.2
Block Diagram
Figure 16-1. CAN Controller Block Diagram
APB Pins
APB
Interface
CAN Control
CANCTL
CANSTS
CANERR
CANBIT
CANINT
CANTST
CANBRPE
CAN Interface 1
CANIF1CRQ
CANIF1CMSK
CANIF1MSK1
CANIF1MSK2
CANIF1ARB1
CANIF1ARB2
CANIF1MCTL
CANIF1DA1
CANIF1DA2
CANIF1DB1
CANIF1DB2
CAN Interface 2
CANIF2CRQ
CANIF2CMSK
CANIF2MSK1
CANIF2MSK2
CANIF2ARB1
CANIF2ARB2
CANIF2MCTL
CANIF2DA1
CANIF2DA2
CANIF2DB1
CANIF2DB2
CAN Core
CAN Tx
CAN Rx
Message Object
Registers
CANTXRQ1
CANTXRQ2
CANNWDA1
CANNWDA2
CANMSG1INT
CANMSG2INT
CANMSG1VAL
CANMSG2VAL
Message RAM
32 Message Objects
Signal Description
The following table lists the external signals of the CAN controller and describes the function of
each. The CAN controller signals are alternate functions for some GPIO signals and default to be
GPIO signals at reset. The column in the table below titled "Pin Mux/Pin Assignment" lists the
possible GPIO pin placements for the CAN signals. The AFSEL bit in the GPIO Alternate Function
Select (GPIOAFSEL) register (page 431) should be set to choose the CAN controller function. The
number in parentheses is the encoding that must be programmed into the PMCn field in the GPIO
Port Control (GPIOPCTL) register (page 448) to assign the CAN signal to the specified GPIO port
pin. For more information on configuring GPIOs, see “General-Purpose Input/Outputs
(GPIOs)” on page 411.
748
October 06, 2012
Texas Instruments-Production Data