Atmel SAM9X25, Manual

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907
11054A–ATARM–27-Jul-11
SAM9X25
907
11054A–ATARM–27-Jul-11
SAM9X25
41.4 Application Block Diagram
Figure 41-2. Application Block Diagram
41.5 I/O Lines Description
41.6 Product Dependencies
41.6.1 I/O Lines
The pins used for interfacing the CAN may be multiplexed with the PIO lines. The programmer
must first program the PIO controller to assign the desired CAN pins to their peripheral function.
If I/O lines of the CAN are not used by the application, they can be used for other purposes by
the PIO Controller.
41.6.2 Power Management
The programmer must first enable the CAN clock in the Power Management Controller (PMC)
before using the CAN.
A Low-power Mode is defined for the CAN controller: If the application does not require CAN
operations, the CAN clock can be stopped when not needed and be restarted later. Before stop-
ping the clock, the CAN Controller must be in Low-power Mode to complete the current transfer.
After restarting the clock, the application must disable the Low-power Mode of the CAN
controller.
41.6.3 Interrupt
S oftw a re
S oftw a re
CAN Controller
Tr a n s ceiver
Implement a tion L a yer s
CAN- bas ed Applic a tion L a yer
CAN- bas ed Profile s
CAN D a t a Link L a yer
CAN Phy s ic a l L a yer
Table 41-1. I/O Lines Description
Name Description Type
CANRX CAN Receive Serial Data Input
CANTX CAN Transmit Serial Data Output
Table 41-2. Peripheral IDs
Instance ID
CAN0 29
CAN1 30