Texas Instruments C2000 Workshop Guide And Lab Manual

Enhanced Controller Area Network (eCAN)
C2000 Microcontroller Workshop - Communications 13 - 29
eCAN Block Diagram
Memory Management
Unit
CPU Interface,
Receive Control Unit
Timer Management Unit
eCAN Memory
(512 bytes)
Register and Message
Object Control
Mailbox RAM
(512 bytes)
32 Mailboxes
(4 x 32-bit words)
32
32
Receive Buffer
Transmit Buffer
Control Buffer
Status Buffer
SN65HVD23x
3.3-V CAN Transceiver
CAN Bus
32
32
Data
Address
eCAN0INT
eCAN1INT
A message mailbox
Identifier – MID
Control – MCF
Data low – MDL
Data high - MDH
The CAN controller module contains 32 mailboxes for objects of 0 to 8-byte data lengths:
• configurable transmit/receive mailboxes
• configurable with standard or extended indentifier
The CAN module mailboxes are divided into several parts:
• MID – contains the identifier of the mailbox
• MCF (Message Control Field) – contains the length of the message (to transmit or
receive) and the RTR bit (Remote Transmission Request – used to send remote
frames)
• MDL and MDH – contains the data
The CAN module contains registers which are divided into five groups. These registers are
located in data memory from 0x006000 to 0x0061FF. The five register groups are:
• Control & Status Registers
• Local Acceptance Masks
• Message Object Time Stamps
• Message Object Timeout
• Mailboxes

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English