Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Scheda Tecnica
Codici prodotto
AT91SAM9X25-EK
899
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
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.
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 stopping 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.
can be stopped when not needed and be restarted later. Before stopping 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
The CAN interrupt line is connected on one of the internal sources of the Advanced Interrupt Controller. Using the CAN
interrupt requires the AIC to be programmed first. Note that it is not recommended to use the CAN interrupt line in edge-
sensitive mode.
interrupt requires the AIC to be programmed first. Note that it is not recommended to use the CAN interrupt line in edge-
sensitive mode.
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. I/O Lines
Instance
Signal
I/O Line
Peripheral
CAN0
CANRX0
PA9
B
CAN0
CANTX0
PA10
B
CAN1
CANRX1
PA6
B
CAN1
CANTX1
PA5
B
Table 41-3. Peripheral IDs
Instance
ID
CAN0
29
CAN1
30