FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
30-37
Preliminary
30.5.2.22 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.
SBVA
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
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
FlexRay block 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 30-22. Protocol Status Register 3 (PSR3)
Table 30-29. PSR3 Field Descriptions (Sheet 1 of 2)
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
Table 30-28. PSR2 Field Descriptions (Sheet 2 of 2)
Field
Description