NXP Semiconductors MPC5644A, Reference Manual, Page: 1486 / 1735

FlexRay Communication Controller (FlexRay)
MPC5644A Microcontroller Reference Manual, Rev. 6
1486 Freescale Semiconductor
33.5.2.30 Offset Correction Value Register (FR_OFCORVR)
This register provides the sign extended offset correction value in microticks as it was calculated by the
clock synchronization algorithm. The CC updates this register during the NIT.
Table 33-34. FR_RTCORVR field description
Field Description
RATECORR Rate Correction Value — protocol related variable: vRateCorrection (before value limitation and
external rate correction)
This field provides the sign extended rate correction value in microticks as it was calculated by the
clock synchronization algorithm. The value is represented in 2’s complement format. This value does
not include the value limitation and the application of the external rate correction. If the magnitude of
the internally calculated rate correction value exceeds the limit given by rate_correction_out in the
Protocol Configuration Register 13 (FR_PCR13) , the clock correction reached limit interrupt flag
CCL_IF is set in the Protocol Interrupt Flag Register 0 (FR_PIFR0) .
Note: If the CC was not able to calculate a new rate correction term due to a lack of synchronization
frames, the RATECORR value is not updated.
Base + 0x003A Additional Reset: RUN Command
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R OFFSETCORR
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 33-30. Offset Correction Value Register (FR_OFCORVR)
Table 33-35. FR_OFCORVR field description
Field Description
OFFSETCORR Offset Correction Value — protocol related variable: vOffsetCorrection (before value limitation
and external offset correction)
This field provides the sign extended offset correction value in microticks as it was calculated by
the clock synchronization algorithm. The value is represented in 2’s complement format. This
value does not include the value limitation and the application of the external offset correction. If
the magnitude of the internally calculated rate correction value exceeds the limit given by
offset_correction_out field in the
Protocol Configuration Register 29 (FR_PCR29) , the clock
correction reached limit interrupt flag CCL_IF is set in the Protocol Interrupt Flag Register 0
(FR_PIFR0) .
Note: If the CC was not able to calculate an new offset correction term due to a lack of
synchronization frames, the OFFSETCORR value is not updated.