FlexRay Communication Controller (FLEXRAY)
Freescale Semiconductor
22-35
PXR40 Microcontroller Reference Manual, Rev. 1
22.5.2.22 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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 22-22. Protocol Status Register 3 (PSR3)
Table 22-28. 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 22-27. PSR2 Field Descriptions (continued)
Field
Description
Summary of Contents for PXR4030
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