Specifications

Overview of the CAN Network

10-5

CAN Controller Module

The CAN module is a 16-bit peripheral that accesses the following:

- Control/status registers

- Mailbox RAM

Control/Status Registers

: The CPU performs 16-bit accesses to the control/

status registers. The CAN peripheral always presents full 16-bit data to the

CPU bus during read cycles.

Mailbox RAM

: Writing/reading from the mailbox RAM is always wordwise

(16 bits) and the RAM always presents the full 16-bit word on the bus.

Table 10–1 shows the configuration details of the mailboxes.

Table 10–1. Mailbox Configuration Details

Mailbox Operating Mode LAM Used

0 Receive only LAM0

1 Receive only LAM0

2 Transmit/Receive (configurable) LAM1

3 Transmit/Receive (configurable) LAM1

4 Transmit only —

Transmit only —