37.5.2.1 Default Behavior

For internal timestamp generation the CAN supplies a 16-bit wrap-around counter. A prescaler TSCC.TCP can be configured to clock the counter in multiples of CAN bit times (1…16). The counter is readable via TSCV.TSC. A write access to register TSCV resets the counter to zero. When the timestamp counter wraps around interrupt flag IR.TSW is set.

On start of frame reception / transmission the counter value is captured and stored into the timestamp section of an Rx Buffer / Rx FIFO (RXTS[15:0]) or Tx Event FIFO (TXTS[15:0]) element.

By programming bit TSCC.TSS, 16-bit external counter can be used, instead of the internal 16-bit counter. The Counter value can be provided by the TSU extension.