NXP Semiconductors PXN2020 - 26.5.2.22 Protocol Status Register 3 (PSR3)

FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
26-36 Freescale Semiconductor
26.5.2.22 Protocol Status Register 3 (PSR3)
This register provides aggregated channel status information as an accrued status of channel activity for
all communication slots, regardless of whether they are assigned for transmission or subscribed for
reception. It provides accrued information for the symbol window, the NIT, and the wakeup status.
SSEA 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.
MTA 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.
CLKCORR-
FAILCNT
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 (PCR8). The
controller 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.
Base + 0x002E Additional Reset: RUN Command Write: Normal Mode
0123456789101112131415
R 0 0 WUB ABVB AACB ACEB ASEB AVFB 0 0 WUA ABVA AACA ACEA ASEA AVFA
W w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c w1c
Reset0000000000000000
Figure 26-22. Protocol Status Register 3 (PSR3)
Table 26-28. PSR3 Field Descriptions
Field Description
WUB Wakeup Symbol Received on Channel B — This flag is set when a wakeup symbol was received on
channel B.
0 No wakeup symbol received.
1 Wakeup symbol received.
ABVB Aggregated Boundary Violation on Channel B — This flag is set when a boundary violation has been
detected on channel B. Boundary violations are detected in the communication slots, the symbol window, and
the NIT.
0 No boundary violation detected.
1 Boundary violation detected.
AACB Aggregated Additional Communication on Channel B — This flag is set when at least one valid frame was
received on channel B in a slot that also contained an additional communication with either syntax error, content
error, or boundary violations.
0 No additional communication detected.
1 Additional communication detected.
Table 26-27. PSR2 Field Descriptions (continued)
Field Description