
• The second bit of Intermission field next to the frame that carried the message
that is in the Rx SMB.
• The first bit of an overload frame next to the frame that carried the message that
is in the Rx SMB.
• There is no ongoing matching process.
• The destination mailbox is not locked by the CPU.
• There is no ongoing move-in process from another Rx SMB. If more than one move-
in process is to be started at the same time, both are performed and the newest
substitutes for the oldest.
The term pending move-in is used throughout the documentation and stands for a move-
to-be that still does not satisfy all of the aforementioned conditions.
The move-in is cancelled and the Rx SMB is able to receive another message if any of
the following conditions is satisfied:
• The destination mailbox is inactivated after the CAN bus has reached the first bit of
Intermission field next to the frame that carried the message and its matching process
has finished.
• There is a previous pending move-in to the same destination mailbox.
• The Rx SMB is receiving a frame transmitted by the FlexCAN itself and self-
reception is disabled (MCR[SRXDIS] is asserted).
• Any CAN protocol error is detected.
Note that the pending move-in is not cancelled if the module enters Freeze or Low-Power
mode. It stays on hold, only waiting for Freeze and Low-Power mode to be exited and the
module to be unlocked. If an MB is unlocked during Freeze mode, the move-in happens
immediately.
The move-in process is the execution by the FlexCAN of the following steps:
1. Push IDHIT into the RXFIR FIFO if the message is destined for the Rx FIFO.
2. Read all data words from the Rx SMB in accordance with the selected payload size
for the Rx storage element.
3. Write all data words to the Rx mailbox in accordance with the selected payload size
for the Rx storage element. If the data size of the storage element is smaller than the
original payload size described in the message's DLC field, the payload is truncated
and the high order bytes that do not fit the destination size are lost.
4. Read the Control/Status and ID words from the Rx SMB.
5. Write Control/Status and ID words to the Rx mailbox, and update the CODE field.
Functional description
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NXP Semiconductors
Содержание MWCT101 S Series
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