NXP Semiconductors MPC5777C - JTAG Connector; Nexus Connector (Trace)

M_CAN_CCCR field descriptions (continued)
Field Description
0 This node transmits all frames in CAN format according to ISO11898-1
1 This node transmits all frames (excluding remote frames) in CAN FD format
20–21
CMR
CAN Mode Request
A change of the CAN operation mode is requested by writing to this bit field. After change to the requested
operation mode the bit field is reset to 00 and the status flags FDBS and FDO are set accordingly. In case
the requested CAN operation mode is not enabled, the value written to CMR is retained until it is
overwritten by the next mode change request. In case CME = 01/10/11 a change to CAN operation
according to ISO 11898-1 is always possible. Default is CAN operation according to ISO11898-1.
00 Unchanged
01 Request CAN FD operation
10 Request CAN FD operation with bit rate switching
11 Request CAN operation according ISO11898-1
22–23
CME
CAN Mode Enable
NOTE: When CME = 00, received frames are strictly interpreted according to ISO11898-1, which leads
to the transmission of an error frame when receiving a CAN FD frame. In case CME = 01,
transmission of long CAN FD frames and reception of long and fast CAN FD frames is enabled.
With CME = 10/11, transmission and reception of long and fast CAN FD frames is enabled.
NOTE: This field has Protected Write status.
00 CAN operation according to ISO11898-1 enabled
01 CAN FD operation enabled
10 CAN FD operation with bit rate switching enabled
11 CAN FD operation with bit rate switching enabled
24
TEST
Test Mode Enable
Bit TEST can only be set by the CPU when both CCE and INIT are set to 1. The bit can be reset by the
CPU at any time.
0 Normal operation, register TEST holds reset values
1 Test Mode, write access to register TEST enabled
25
DAR
Disable Automatic Retransmission
NOTE: This field has Protected Write status.
0 Automatic retransmission of messages not transmitted successfully enabled
1 Automatic retransmission disabled
26
MON
Bus Monitoring Mode
Bit MON can only be set by the CPU when both CCE and INIT are set to 1. The bit can be reset by the
CPU at any time.
0 Bus Monitoring Mode is disabled
1 Bus Monitoring Mode is enabled
27
CSR
Clock Stop Request
Table continues on the next page...
Chapter 3 Modular CAN (M_CAN)
MPC5777C Reference Manual Addendum, Rev. 1, 12/2015
Freescale Semiconductor, Inc. 35