FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
30-35
Preliminary
30.5.2.21 Protocol Status Register 2 (PSR2)
This register provides a snapshot of status information about the Network Idle Time NIT, the Symbol
Window and the clock synchronization. The NIT related status bits NBVB, NSEB, NBVA, and NSEA are
updated by the FlexRay block after the end of the NIT and before the end of the first slot of the next
Table 30-27. PSR1 Field Descriptions
Field
Description
CSAA
Cold Start Attempt Aborted Flag. Protocol related event: ‘set coldstart abort indicator in CHI’
This flag is set when the FlexRay block has aborted a cold start attempt.
0 No such event
1 Cold start attempt aborted
CSP
Leading Cold Start Path. This status bit is set when the FlexRay block has reached the
POC:normal active
state
via the leading cold start path. This indicates that this node has started the network
0 No such event
1
POC:normal active
reached from
POC:startup
state via leading cold start path
REMCSAT
Remaining Cold Start Attempts. Protocol related variable:
vRemainingColdstartAttempts
This field provides the number of remaining cold start attempts that the FlexRay block will execute.
CPN
Leading Cold Start Path Noise. Protocol related variable:
vPOC!ColdstartNoise
This status bit is set if the FlexRay block has reached the
POC:normal active
state via the leading cold start path
under noise conditions. This indicates there was some activity on the FlexRay bus while the FlexRay block was
starting up the cluster.
0 No such event
1
POC:normal active
state was reached from
POC:startup
state via noisy leading cold start path
HHR
Host Halt Request Pending. Protocol related variable:
vPOC!CHIHaltRequest
This status bit is set when FlexRay block receives the HALT command from the application via the
Operation Control Register (POCR)
. The FlexRay block clears this status bit after a hard reset condition or when
the protocol is in the
POC:default config
state.
0 No such event
1 HALT command received
FRZ
Freeze Occurred. Protocol related variable:
vPOC!Freeze
This status bit is set when the FlexRay block has reached the
POC:halt
state due to the host FREEZE command
or due to an internal error condition requiring immediate halt. The FlexRay block clears this status bit after a hard
reset condition or when the protocol is in the
POC:default config
state.
0 No such event
1 Immediate halt due to FREEZE or internal error condition
APTAC
Allow Passive to Active Counter. Protocol related variable:
vPOC!vAllowPassivetoActive
This field provides the number of consecutive even/odd communication cycle pairs that have passed with valid
rate and offset correction terms, but the protocol is still in the
POC:normal passive
state due to an application
configured delay to enter
POC:normal active
state. This delay is defined by the allow_passive_to_active field in
the
Protocol Configuration Register 12 (PCR12)
Base + 0x002C
Additional Reset: RUN Command
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R NBVB NSEB STCB SBVB SSEB MTB
NBVA NSEA STCA SBVA SSEA
MTA
CLKCORRFAILCNT
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 30-21. Protocol Status Register 2 (PSR2)