XC164-16 Datasheet, PDF (319/417 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core Volume 2 (of 2): Peripheral Units

XC164-16 Derivatives
Peripheral Units (Vol. 2 of 2)
TwinCAN Module
If several valid message objects with pending transmission request are noticed by the
associated CAN node controller, the contents of the message object with the lowest
message number is transmitted first.
Bitfield NEWDAT is internally reset by the respective CAN node controller when the
contents of the selected message object’s data registers is copied to the bitstream
processor. Bitfields RMTPND and TXRQ are automatically reset when the message
object has been successfully transmitted.
The captured value of the frame counter is copied to bitfield CFCVAL in register
MSGCTRn and a transmit interrupt request is generated (INTPNDn and TXIPNDn are
set) if enabled by TXIE = ‘10’. Then the Frame Counter is incremented by one if enabled
in control register AFCR/BFCR.
When a data frame with matching identifier is received, it is ignored by the respective
transmit object and not indicated by any interrupt request.
User’s Manual
TwinCAN_X41, V2.1
21-19
V2.1, 2004-03