mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 90

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

FlexRay Module (FLEXRAYV2)
3.3.2.21
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
90
0x002C
Reset
REMCSAT
APTAC
CSAA
W
Field
12–8
R NBVB NSEB STCB SBVB SSEB MTB NBVA NSEA STCA SBVA SSEA MTA
CSP
CPN
HHR
FRZ
4–0
15
14
7
6
5
15
0
Cold Start Attempt Aborted Flag — protocol related event: ‘set coldstart abort indicator in CHI’
This flag bit is set when the FlexRay modulehas aborted a cold start attempt. The application clears this flag by
writing 1 to it. Writing a 0 will not change the state of the flag. If the application clears the flag while the FlexRay
module sets the flag at the same time, then the flag is not cleared.
0 No such event
1 Cold start attempt aborted
Leading Cold Start Path — This status bit is set when the FlexRay module has reached the
state via the leading cold start path. This indicates that this node has started the network
0 No such event
1
Remaining Coldstart Attempts — protocol related variable:
This field provides the number of remaining cold start attempts that the FlexRay module will execute.
Leading Cold Start Path Noise — protocol related variable:
This status bit is set if the FlexRay module has reached the
path under noise conditions. This indicates there was some activity on the FlexRay bus while the FlexRay
module was starting up the cluster.
0 No such event
1
Host Halt Request Pending — protocol related variable:
This status bit is set when FlexRay module receives the HALT command from the application via the
Operation Control Register
when the protocol is in the
0 No such event
1 HALT command received
Freeze Occurred — protocol related variable:
This status bit is set when the FlexRay module has reached the
command or due to an internal error condition requiring immediate halt. The FlexRay module clears this status
bit after a hard reset condition or when the protocol is in the
0 No such event
1 Immediate halt due to FREEZE or internal error condition
Allow Passive to Active Counter — protocol related variable:
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
configured delay to enter
the
incremented any more.
Protocol Status Register 2 (PSR2)
14
0
POC:normal active
POC:normal active
Protocol Configuration Register 12
13
0
12
0
Figure 3-20. Protocol Status Register 2 (PSR2)
reached from
state was reached from
11
0
POC:normal active
Table 3-26. PSR1 Field Descriptions
POC:default config
(POCR). The FlexRay module clears this status bit after a hard reset condition or
Additional Reset: RUN Command
10
0
MFR4300 Data Sheet, Rev. 3
POC:startup
(PCR12). If this APTAC counter has reached its maximum value, it is not
0
9
state. This delay is defined by the allow_passive_to_active field in
POC:startup
state.
vPOC!Freeze
0
8
Description
state via leading cold start path
0
7
vPOC!CHIHaltRequest
state via noisy leading cold start path
POC:normal active
POC:default config
POC:normal passive
vPOC!ColdstartNoise
vRemainingColdstartAttempts
6
0
vPOC!AllowPassivetoActive
POC:halt
0
5
state due to the host FREEZE
0
4
state via the leading cold start
state.
state due to an application
0
3
Freescale Semiconductor
CLKCORRFAILCNT
POC:normal active
0
2
1
0
Protocol
0
0