Texas-instruments Digital Signal Processor SM320F2812-HT Instrukcja Użytkownika Pobierz pdf (Strona 63)

SM320F2812-HT

www.ti.com

SGUS062B– JUNE 2009– REVISED JUNE 2011

4.4 Enhanced Controller Area Network (eCAN) Module

The CAN module has the following features:

• Fully compliant with CAN protocol, version 2.0B

• Supports data rates up to 1 Mbps

• Thirty-two mailboxes, each with the following properties:

– Configurable as receive or transmit

– Configurable with standard or extended identifier

– Has a programmable receive mask

– Supports data and remote frame

– Composed of 0 to 8 bytes of data

– Uses a 32-bit time stamp on receive and transmit message

– Protects against reception of new message

– Holds the dynamically programmable priority of transmit message

– Employs a programmable interrupt scheme with two interrupt levels

– Employs a programmable alarm on transmission or reception time-out

• Low-power mode

• Programmable wake-up on bus activity

• Automatic reply to a remote request message

• Automatic retransmission of a frame in case of loss of arbitration or error

• 32-bit local network time counter synchronized by a specific message (communication in conjunction

with mailbox 16)

• Self-test mode

– Operates in a loopback mode receiving its own message. A dummy acknowledge is provided,

thereby eliminating the need for another node to provide the acknowledge bit.

NOTE

For a SYSCLKOUT of 150 MHz, the smallest bit rate possible is 23.4 kbps.

The 28x CAN has passed the conformance test per ISO/DIS 16845. Contact TI for further details.

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Texas-instruments Digital Signal Processor SM320F2812-HT Instrukcja Użytkownika Strona 63