XC2700 Datasheet, PDF (52/62 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller

XC2700 Derivatives
XC2000 Family / Alpha Line
Detailed Errata Description
However, SUSACK has no effect on applications, as its original intention is to have an
indication that the suspend mode of the node is reached during debugging.
MultiCAN_TC.H002 Double Synchronization of receive input
The MultiCAN module has a double synchronization stage on the CAN receive inputs.
This double synchronization delays the receive data by 2 module clock cycles. If the
MultiCAN is operating at a low module clock frequency and high CAN baudrate, this
delay may become significant and has to be taken into account when calculating the
overall physical delay on the CAN bus (transceiver delay etc.).
MultiCAN_TC.H003 Message may be discarded before transmission in
STT mode
If MOFCRn.STT=1 (Single Transmit Trial enabled), bit TXRQ is cleared (TXRQ=0) as
soon as the message object has been selected for transmission and, in case of error, no
retransmission takes places.
Therefore, if the error occurs between the selection for transmission and the real start of
frame transmission, the message is actually never sent.
Workaround
In case the transmission shall be guaranteed, it is not suitable to use the STT mode. In
this case, MOFCRn.STT shall be 0.
MultiCAN_TC.H004 Double remote request
Assume the following scenario: A first remote frame (dedicated to a message object) has
been received. It performs a transmit setup (TXRQ is set) with clearing NEWDAT.
MultiCAN starts to send the receiver message object (data frame), but loses arbitration
against a second remote request received by the same message object as the first one
(NEWDAT will be set).
When the appropriate message object (data frame) triggered by the first remote frame
wins the arbitration, it will be sent out and NEWDAT is not reset. This leads to an additional
data frame, that will be sent by this message object (clearing NEWDAT).
There will, however, not be more data frames than there are corresponding remote
requests.
Errata Sheet
52
V1.7, 2014-10