TMS320LC2401AVFS datasheet(51/134 Pages) TI

51 / 134 page

TMS320LF2407A,TMS320LF2406A,TMS320LF2403A,TMS320LF2402A

TMS320LC2406A,TMS320LC2404A,TMS320LC2403A,TMS320LC2402A

DSP CONTROLLERS

SPRS145K − JULY 2000 − REVISED AUGUST 2005

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

controller area network (CAN) module

The CAN module is a full-CAN controller designed as a 16-bit peripheral module and supports the following

features:

D CAN specification 2.0B (active)

−

Standard data and remote frames

−

Extended data and remote frames

D Six mailboxes for objects of 0- to 8-byte data length

−

Two receive mailboxes, two transmit mailboxes

−

Two configurable transmit/receive mailboxes

D Local acceptance mask registers for mailboxes 0 and 1 and mailboxes 2 and 3

D Configurable standard or extended message identifier

D Programmable bit rate

D Programmable interrupt scheme

D Readable error counters

D Self-test mode

−

In this mode, the CAN module operates in a loop-back fashion, receiving its own transmitted message.

The CAN module is a 16-bit peripheral. The accesses are split into the control/status-registers accesses and

the mailbox-RAM accesses.

CAN peripheral registers: The CPU can access the CAN peripheral registers only using 16-bit write accesses.

The CAN peripheral always presents full 16-bit data to the CPU bus during read cycles.

CAN controller architecture

Figure 13 shows the basic architecture of the CAN controller through this block diagram of the CAN Peripherals.

Temporary Receive Buffer

Data

CAN Module

Control Logic

CPU Interface/

Memory Management Unit

CAN

Core

Control/Status Registers

Interrupt Logic

Control Bus

Acceptance Filter

Transmit Buffer

RAM 48x16

CANTX

CAN

Transceiver

Matchid

CPU

mailbox 0

mailbox 1

mailbox 2

mailbox 3

mailbox 4

mailbox 5

T/R

CANRX

Figure 13. CAN Module Block Diagram

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