Datasheet

Section 15 Controller Area Network for Tiny (TinyCAN)
Rev. 4.00 Mar. 15, 2006 Page 339 of 556
REJ09B0026-0400
Case 1: Overwrite (NMC = 1, 1st: Data Frame, 2nd: Remote Frame)
TinyCANOther module
Data frame reception
Data frame reception
Remote frame reception
Remote frame reception
Data frame reception
Remote frame reception
Data frame reception Remote frame reception
MBn in RXPR
DFRI in TCIRR0
MBn in RFPR
RFRI in TCIRR0
MBn in UMSR
OVRI in TCIRR1
RTR in MCn4
CPU access
Case 2: Overwrite (NMC = 1, 1st: Remote Frame, 2nd: Data Frame)
TinyCANOther module
MBn in RXPR
DFRI in TCIRR0
MBn in RFPR
RFRI in TCIRR0
MBn in UMSR
OVRI in TCIRR1
RTR in MCn4
CPU access
Case 3: Overrun (NMC = 0, 1st: Data Frame, 2nd: Remote Frame)
TinyCANOther module
MBn in RXPR
DFRI in TCIRR0
MBn in RFPR
RFRI in TCIRR0
MBn in UMSR
OVRI in TCIRR1
RTR in MCn4
CPU access
Case 4: Overrun (NMC = 0, 1st: Remote Frame, 2nd: Data Frame)
TinyCANOther module
MBn in RXPR
DFRI in TCIRR0
MBn in RFPR
RFRI in TCIRR0
MBn in UMSR
OVRI in TCIRR1
RTR in MCn4
CPU access
Figure 15.16 RXPR/RFPR Set/Clear Timing when Overrun/Overwrite Occurs