Datasheet

Byte Data Link Controller Module
Receiving A Message
MC9S12DP256 — Revision 1.1
Byte Data Link Controller Module
CRC Error If a CRC error is detected during a message reception, this will be
reflected in the BSVR once an EOD time is recognized by the BDLC.
Since all bytes of the message will have been received when this error
is detected, it is up to the user to ensure that all the received message
bytes are discarded.
Invalid or Out of
Range Symbol
If an invalid or out of range symbol, a framing error or a BREAK symbol
is detected on the SAE J1850 bus during the reception of a message,
the BDLC will immediately stop receiving the message and discard any
partially received byte. The “Symbol Invalid or Out of Range” status will
immediately be reflected in the DLCBSVR. Following this the BDLC will
wait until the bus has been idle for a time period equal to an EOF symbol
before receiving another message. As with the CRC error, the user
should discard any partially received message if this occurs.
In-Frame
Response to a
Received
Message
As mentioned above, if one or more IFR bytes are received following the
reception of a message, the status indicating the reception of the IFR
byte(s) will be indicated in the DLCBSVR before the EOF is indicated.
Refer to Receiving An In-Frame Response (IFR) for a description of how
to deal with the reception of IFR bytes.
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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