PXS20RM Datasheet, PDF (751/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
Table 26-28. FR_PSR2 field descriptions (continued)
Field
Description
MTB
NBVA
NSEA
STCA
SBVA
SSEA
MTA
CLKCORR-
FAILCNT
Media Access Test Symbol MTS Received on Channel B — protocol related variable:
vSS!ValidMTS for Symbol Window on channel B
This status bit is set if the Media Access Test Symbol MTS was received in the symbol window on
channel B.
0 No such event
1 MTS symbol received
NIT Boundary Violation on Channel A — protocol related variable: vSS!BViolation for NIT on
channel A
This status bit is set when there was some media activity on the FlexRay bus channel A at the end
of the NIT.
0 No such event
1 Media activity at boundaries detected
NIT Syntax Error on Channel A — protocol related variable: vSS!SyntaxError for NIT on channel
A
This status bit is set when a syntax error was detected during NIT on channel A.
0 No such event
1 Syntax error detected
Symbol Window Transmit Conflict on Channel A — protocol related variable: vSS!TxConflict
for symbol window on channel A
This status bit is set if there was a transmission conflicts during the symbol window on channel A.
0 No such event
1 Transmission conflict detected
Symbol Window Boundary Violation on Channel A — protocol related variable: vSS!BViolation
for symbol window on channel A
This status bit is set if there was some media activity on the FlexRay bus channel A at the start or
at the end of the symbol window.
0 No such event
1 Media activity at boundaries detected
Symbol Window Syntax Error on Channel A — protocol related variable: vSS!SyntaxError for
symbol window on channel A
This status bit is set when a syntax error was detected during the symbol window on channel A.
0 No such event
1 Syntax error detected
Media Access Test Symbol MTS Received on Channel A — protocol related variable:
vSS!ValidMTS for symbol window on channel A
This status bit is set if the Media Access Test Symbol MTS was received in the symbol window on
channel A.
1 MTS symbol received
0 No such event
Clock Correction Failed Counter — protocol related variable: vClockCorrectionFailed
This field provides the number of consecutive even/odd communication cycle pairs that have
passed without clock synchronization having performed an offset or a rate correction due to lack
of synchronization frames. It is not incremented when it has reached the configured value of either
max_without_clock_correction_fatal or max_without_clock_correction_passive as defined in the
Protocol Configuration Register 8 (FR_PCR8). The CC resets this counter on a hard reset
condition, when the protocol enters the POC:normal active state, or when both the rate and offset
correction terms have been calculated successfully.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
26-39