Basic Can Mode - Renesas M16C/29 Series Hardware Manual

M16C/29 Group

17.6. Basic CAN Mode

When the BasicCAN bit in the C0CTLR register is set to "1", slots 14 and 15 correspond to Basic CAN
mode. When slots 14 and 15 are defined as reception slots in Basic CAN mode, received messages are
stored in slots 14 and 15 alternately.
Figure 17.24 shows the operation of slots 14 and 15 in Basic CAN mode.
Slot 14
Slot 15
Figure 17.24 Operation of Slots 14 and 15 in Basic CAN Mode
When using Basic CAN mode, note the following points.
(1) Setting of Basic CAN mode has to be done in CAN reset/initialization mode.
(2) Select the same ID for slots 14 and 15. Also, setting of the C0LMAR and C0LMBR register has to be
the same.
(3) Define slots 14 and 15 as reception slot only.
(4) There is no protection available against message overwrite. A message can be overwritten by a new
message.
(5) Slots 0 to 13 can be used in the same way as in normal CAN operation mode.
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
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