SAM7X512 Atmel Corporation, SAM7X512 Datasheet - Page 519
SAM7X512
Manufacturer Part Number
SAM7X512
Description
Manufacturer
Atmel Corporation
Specifications of SAM7X512
Flash (kbytes)
512 Kbytes
Pin Count
100
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
62
Ext Interrupts
62
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
3
Can
1
Ssc
1
Ethernet
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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36.7.2
6120I–ATARM–06-Apr-11
CAN Controller Interrupt Handling
Figure 36-10. Possible Initialization Procedure
There are two different types of interrupts. One type of interrupt is a message-object related
interrupt, the other is a system interrupt that handles errors or system-related interrupt sources.
All interrupt sources can be masked by writing the corresponding field in the CAN_IDR register.
They can be unmasked by writing to the CAN_IER register. After a power-up reset, all interrupt
sources are disabled (masked). The current mask status can be checked by reading the
CAN_IMR register.
The CAN_SR register gives all interrupt source states.
The following events may initiate one of the two interrupts:
• Message object interrupt
• System interrupts
– Data registers in the mailbox object are available to the application. In Receive
– A sent transmission was aborted.
– Bus off interrupt: The CAN module enters the bus off state.
– Error passive interrupt: The CAN module enters Error Passive Mode.
– Error Active Mode: The CAN module is neither in Error Passive Mode nor in Bus Off
Mode, a new message was received. In Transmit Mode, a message was transmitted
successfully.
mode.
Configure a Mailbox in Reception Mode
Enable CAN Controller Interrupt Line
(ABM == 1 and CANEN == 1)
Enable CAN Controller Clock
(CAN_SR or CAN_MSRx)
ABM = 0 and CANEN = 0
CANEN = 1 (ABM == 0)
Change CAN_BR value
End of Initialization
Errors ?
(PMC)
(AIC)
No
SAM7X512/256/128
Yes
519
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