Hardware manual

RX600 Series CAN Application Programming Interface
R01AN0339EU0203 Rev. 2.03 Page 28 of 29
Mar 23, 2013
11. Time Stamp
The timestamp function captures the value of the on-chip time stamp to a mailbox when a message is received. By
examining the time stamp you can for example determine the sequence of messages if they are spread out over multiple
receive mailboxes to determine the order of the messages. Time stamp reading is not done by the API, so you will have
to poll the mailbox, and if the return value is R_CAN_OK (a message waiting) you can then go in and read the
timestamp.
Figure 9. CAN Timestamp is available in each mailbox.
12. CAN Sleep Mode
The default mode after an MCU reset is CAN Sleep mode. Use the API to switch to other operating modes, see the
R_CAN_Control API. Entering the CAN Sleep mode instantly stops the clock supply to the module and thereby
reduces power dissipation. All registers remain unchanged when the CAN module enters CAN sleep mode.
13. CAN FIFO
CAN FIFO buffering is available for the RX. 24 mailboxes can be configured for either transmission or reception. The
FIFO can be used by polling or with interrupts.