Fujitsu MB90390 Series Hardware Manual page 499

Table 23.6-3 Correspondence between NS1 and NS0 and Node Status
NS1
Note:
Warning (error active) is included in the error active in CAN Specification 2.0B for the node status,
however, indicates that the transmit error counter or receive error counter has exceeded 96. The
node status change diagram is shown in Figure 23.6-3.
REC >= 128
or
TEC >= 128
Error
passive
NS0
0 0
0 1
1 0
1 1
Figure 23.6-3 Node Status Transition Diagram
Hardware reset
Error active
REC >= 96
or
TEC >= 96
REC < 96
and
TEC < 96
Warning
(Error active)
REC < 128
and
TEC < 128
TEC >= 256
Node Status
Error active
Warning (error active)
Error passive
Bus off
REC: Receive error counter
TEC: T r ansmit error counter
After "0" has been written to the HALT bit of
the register(CSR), continuous 11-bit "H"
levels (recessive bits) a reinput 128 times
to the receive input pin (RX).
(HALT =1)
CHAPTER 23 CAN CONTROLLER
Bus off
471