Errata Sheet - Infineon

Errata Sheet
XC161CS-32F, (E)ES-BB, BB
Functional Problems
• In case writing to a CAN register shall be the exception, use the last error code (LEC)
interrupt. This shall start writing to one of the MSGCTRx register FFFF H , in case the
LEC value is unequal to 0.
TwinCAN_AI.008 Double remote request
After the transmission of the remote request, TXRQ is not cleared in the receive object,
if NEWDAT is set. As a consequence the remote request is transmitted once again.
Workaround:
Clear NEWDAT after the reception of a data frame.
TwinCAN_AI.009 CPUUPD remote
In case of a remote request to a standard message object which is chosen for
transmission, a transmit of the data frame takes place, even if CPUUPD is currently set.
Detailed Description
If a transmit message object gets a remote request and there is no other message object
with higher transmit priority pending for transmission, then the transmit object sends the
data frame to answer the remote request, even if CPUUPD is set.
Workaround:
This workaround is only required in systems where remote requests are used.
To answer remote requests, the MMC bitfield in MSGFGCR has to be configured to a
FIFO slave object instead of a standard message object for transmission. To reach this
goal, the following settings for the corresponding message object are needed:
• bitfield MMC (MSGFGCRHn.10-8) = 011 B (FIFO functionality enabled (slave object))
• bitfield CANPTR (MSGFGCRHn.4-0) = n (the CAN Pointer shall reference itself, by
referring to the message object number of this object)
• bit FD (MSGFGCRLn.13) = 0 (the CANPTR is updated after a correct reception)
Errata Sheet 21/50 V1.1, 2007-06-21