SAM9X35 Atmel Corporation, SAM9X35 Datasheet - Page 920
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SAM9X35
Manufacturer Part Number
SAM9X35
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9X25.pdf
(45 pages)
3.SAM9X25.pdf
(1145 pages)
4.SAM9X25.pdf
(45 pages)
5.SAM9X25.pdf
(1325 pages)
Specifications of SAM9X35
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
105
Ext Interrupts
105
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
3
Uart
7
Can
2
Lin
4
Ssc
1
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
DDR/LPDDR, SDRAM/LPSDR
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9261 PDF datasheet
- SAM9X25 PDF datasheet #2
- SAM9X25 PDF datasheet #3
- SAM9X25 PDF datasheet #4
- SAM9X25 PDF datasheet #5
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- Download datasheet (30Mb)
41.8.3
41.8.3.1
Figure 41-11. Receive Mailbox
Note:
920
920
Simple Receive Mailbox
(CAN_MSRx)
(CAN_MSRx)
(CAN_MCRx)
CAN_MDHx)
(CAN_MDLx
In the case of ARM architecture, CAN_MSRx, CAN_MDLx, CAN_MDHx can be read using an optimized ldm assembler
instruction.
SAM9X35
SAM9X35
CAN BUS
CAN Controller Message Handling
MRDY
Receive Handling
MTCR
MMI
Reading CAN_MDHx & CAN_MDLx
Two modes are available to configure a mailbox to receive messages. In Receive Mode, the
first message received is stored in the mailbox data register. In Receive with Overwrite Mode,
the last message received is stored in the mailbox.
A mailbox is in Receive Mode once the MOT field in the CAN_MMRx register has been config-
ured. Message ID and Message Acceptance Mask must be set before the Receive Mode is
enabled.
After Receive Mode is enabled, the MRDY flag in the CAN_MSR register is automatically
cleared until the first message is received. When the first message has been accepted by the
mailbox, the MRDY flag is set. An interrupt is pending for the mailbox while the MRDY flag is set.
This interrupt can be masked depending on the mailbox flag in the CAN_IMR global register.
Message data are stored in the mailbox data register until the software application notifies that
data processing has ended. This is done by asking for a new transfer command, setting the
MTCR flag in the CAN_MCRx register. This automatically clears the MRDY signal.
The MMI flag in the CAN_MSRx register notifies the software that a message has been lost by
the mailbox. This flag is set when messages are received while MRDY is set in the CAN_MSRx
register. This flag is cleared by reading the CAN_MSRs register. A receive mailbox prevents
from overwriting the first message by new ones while MRDY flag is set in the CAN_MSRx regis-
ter. See
Message 1
Figure
41-11.
Reading CAN_MSRx
Message 2 lost
Message 1
Writing CAN_MCRx
Message 3
Message 3
Message ID = CAN_MIDx
11055B–ATARM–22-Sep-11
11055B–ATARM–22-Sep-11
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