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Chapter 13 FlexRay Communication Controller (FLEXRAY)
MC9S12XF - Family Reference Manual, Rev.1.19
496
Freescale Semiconductor
13.5.2.23 Protocol Status Register 3 (PSR3)
Write: Normal Mode
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.
6
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
5
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
4
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
3–0
CLKCORR-
FAILCNT
Clock Correction Failed Counter — protocol related variable: vClockCorrectionFailed
This eld 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 congured value of either max_without_clock_correction_fatal or
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.
Module Base + 0x002E
Additional Reset: RUN Command
15
14
13
12
11
10
9876543210
R
0
WUB ABVB AACB ACEB ASEB AVFB
0
WUA ABVA AACA ACEA ASEA AVFA
W
w1c
Reset
0000000000000000
Figure 13-23. Protocol Status Register 3 (PSR3)
Table 13-29. PSR2 Field Descriptions (Sheet 2 of 2)
Field
Description