
Chapter 13 FlexRay Communication Controller (FLEXRAY)
MC9S12XF - Family Reference Manual, Rev.1.19
Freescale Semiconductor
495
SSEB, and MTA are updated by the FlexRay block after the end of the symbol window and before the end
of the current communication cycle. If no symbol window is congured, the symbol window related status
bits remain in their reset state. The clock synchronization related CLKCORRFAILCNT is updated by the
FlexRay block after the end of the static segment and before the end of the current communication cycle.
Table 13-29. PSR2 Field Descriptions (Sheet 1 of 2)
Field
Description
15
NBVB
NIT Boundary Violation on Channel B — protocol related variable: vSS!BViolation for NIT on channel B
This status bit is set when there was some media activity on the FlexRay bus channel B at the end of the NIT.
0 No such event
1 Media activity at boundaries detected
14
NSEB
NIT Syntax Error on Channel B — protocol related variable: vSS!SyntaxError for NIT on channel B
This status bit is set when a syntax error was detected during NIT on channel B.
0 No such event
1 Syntax error detected
13
STCB
Symbol Window Transmit Conict on Channel B — protocol related variable: vSS!TxConict for symbol
window on channel B
This status bit is set if there was a transmission conict during the symbol window on channel B.
0 No such event
1 Transmission conict detected
12
SBVB
Symbol Window Boundary Violation on Channel B — protocol related variable: vSS!BViolation for symbol
window on channel B
This status bit is set if there was some media activity on the FlexRay bus channel B at the start or at the end of
the symbol window.
0 No such event
1 Media activity at boundaries detected
11
SSEB
Symbol Window Syntax Error on Channel B — protocol related variable: vSS!SyntaxError for symbol window
on channel B
This status bit is set when a syntax error was detected during the symbol window on channel B.
0 No such event
1 Syntax error detected
10
MTB
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
9
NBVA
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
8
NSEA
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
7
STCA
Symbol Window Transmit Conict on Channel A — protocol related variable: vSS!TxConict for symbol
window on channel A
This status bit is set if there was a transmission conicts during the symbol window on channel A.
0 No such event
1 Transmission conict detected