LM3S5652 Datasheet, PDF (615/848 Pages) Texas Instruments – Stellaris® LM3S5652 Microcontroller

Stellaris® LM3S5652 Microcontroller
16.1
Block Diagram
Figure 16-1. CAN Controller Block Diagram
CAN Control
CANCTL
CANSTS
CANERR
CANBIT
CANINT
CANTST
CANBRPE
ABP
Pins
APB
Interface
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
16.2
Signal Description
Table 16-1 on page 615 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 Assignment" lists the possible
GPIO pin placements for the CAN signals. The AFSEL bit in the GPIO Alternate Function Select
(GPIOAFSEL) register (page 374) should be set to choose the CAN controller function. For more
information on configuring GPIOs, see “General-Purpose Input/Outputs (GPIOs)” on page 353.
Table 16-1. Controller Area Network Signals (64LQFP)
Pin Name
Pin Number Pin Type Buffer Type^a Description
CAN0Rx
61
I
Analog CAN module 0 receive.
November 17, 2011
615
Texas Instruments-Production Data