NEC V850ES/F 3-L Series User Manual page 605

CAN Controller (CAN) Chapter 18
As long as the RHL contains 23 or less entries the sequence of occurrence is
maintained. If more receptions occur without reading the RHL by the host
processor, complete sequence of receptions can not be recovered.
Figure 18-29 Receive history list
User's Manual U18743EE1V2UM00 605