SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1205
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SAM3X8E
Manufacturer Part Number
SAM3X8E
Description
Manufacturer
Atmel Corporation
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40. Controller Area Network (CAN) Programmer Datasheet
40.1
40.2
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Description
Embedded Characteristics
The CAN controller provides all the features required to implement the serial communication
protocol CAN defined by Robert Bosch GmbH, the CAN specification as referred to by
ISO/11898A (2.0 Part A and 2.0 Part B) for high speeds and ISO/11519-2 for low speeds. The
CAN Controller is able to handle all types of frames (Data, Remote, Error and Overload) and
achieves a bitrate of 1 Mbit/sec.
CAN controller accesses are made through configuration registers. 8 independent message
objects (mailboxes) are implemented.
Any mailbox can be programmed as a reception buffer block (even non-consecutive buffers).
For the reception of defined messages, one or several message objects can be masked without
participating in the buffer feature. An interrupt is generated when the buffer is full. According to
the mailbox configuration, the first message received can be locked in the CAN controller regis-
ters until the application acknowledges it, or this message can be discarded by new received
messages.
Any mailbox can be programmed for transmission. Several transmission mailboxes can be
enabled in the same time. A priority can be defined for each mailbox independently.
An internal 16-bit timer is used to stamp each received and sent message. This timer starts
counting as soon as the CAN controller is enabled. This counter can be reset by the application
or automatically after a reception in the last mailbox in Time Triggered Mode.
The CAN controller offers optimized features to support the Time Triggered Communication
(TTC) protocol.
• Fully Compliant with CAN 2.0 Part A and 2.0 Part B
• Bit Rates up to 1Mbit/s
• 8 Object Oriented Mailboxes with the Following Properties:
• 16-bit Internal Timer for Timestamping and Network Synchronization
• Programmable Reception Buffer Length up to 8 Mailbox Objects
• Priority Management between Transmission Mailboxes
• Autobaud and Listening Mode
• Low Power Mode and Programmable Wake-up on Bus Activity or by the Application
• Data, Remote, Error and Overload Frame Handling
• Write Protected Registers
– CAN Specification 2.0 Part A or 2.0 Part B Programmable for Each Message
– Object Configurable in Receive (with Overwrite or Not) or Transmit Modes
– Independent 29-bit Identifier and Mask Defined for Each Mailbox
– 32-bit Access to Data Registers for Each Mailbox Data Object
– Uses a 16-bit Timestamp on Receive and Transmit Messages
– Hardware Concatenation of ID Masked Bitfields To Speed Up Family ID Processing
SAM3X/A
SAM3X/A
1205
1205
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