RM0029 Datasheet, PDF (1495/1740 Pages) STMicroelectronics – The primary objective of this document

RM0029
FlexRay Communication Controller (FlexRay)
Table 809. FR_PSR1 field description
Field
Description
CSAA
Cold Start Attempt Aborted Flag — protocol related event: ‘set coldstart abort indicator in CHI’
This flag is set when the CC 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 CC 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 Coldstart Attempts — protocol related variable: vRemainingColdstartAttempts
This field provides the number of remaining cold start attempts that the CC will execute.
CPN
Leading Cold Start Path Noise — protocol related variable: vPOC!ColdstartNoise
This status bit is set if the CC 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 CC 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 CC receives the HALT command from the application via the Protocol
Operation Control Register (FR_POCR). The CC 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
Freeze Occurred — protocol related variable: vPOC!Freeze
This status bit is set when the CC has reached the POC:halt state due to the host FREEZE
command or due to an internal error condition requiring immediate halt. The CC clears this status bit
FRZ
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 (FR_PCR12).
Protocol Status Register 2 (FR_PSR2)
Figure 849. Protocol Status Register 2 (FR_PSR2)
Base + 0x002C
Additional Reset: RUN Command
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
CLKCORRFAILCNT
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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,
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