Datasheet

www.ti.com FlexRay Module Registers
26.3.2.4.8 Symbol Window and NIT Status (SWNIT)
Symbol window related status information. Updated by the communication controller at the end of the
symbol window for each channel. During startup the status data is not updated. This register is reset when
the Communication Controller leaves CONFIG state or enters STARTUP state.
Figure 26-153 and Table 26-138 illustrate this register.
Figure 26-153. Symbol Window and NIT Status Register (SWNIT) [offset_CC = 124h]
31 16
Reserved
R-0
15 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved SBNB SENB SBNA SENA MTSB MTSA TCSB SBSB SESB TCSA SBSA SESA
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 26-138. Symbol Window and NIT Status Register (SWNIT) Field Descriptions
Bit Field Value Description
31-12 Reserved 0 Read returns 0. Writes have no effect.
11 SBNB Slot boundary violation during NIT channel B.
0 No slot boundary violation detected
1 Slot boundary violation during NIT detected on channel B
10 SENB Syntax error during NIT channel B.
0 No syntax error detected
1 Syntax error during NIT detected on channel B
9 SBNA Slot boundary violation during NIT channel A.
0 No slot boundary violation detected
1 Slot boundary violation during NIT detected on channel A
8 SENA Syntax error during NIT channel A.
0 No syntax error detected
1 Syntax error during NIT detected on channel A
7 MTSB MTS Received on Channel B. Media Access Test symbol received on channel B during the last symbol
window. Updated by the communication controller for each channel at the end of the symbol window.
When this bit is set to 1, also interrupt flag SIR.MTSB is set to 1.
0 No MTS symbol received on channel B
1 MTS symbol received on channel B
6 MTSA MTS Received on Channel A. Media Access Test symbol received on channel A during the last symbol
window. Updated by the communication controller for each channel at the end of the symbol window.
When this bit is set to 1, also interrupt flag SIR.MTSB is set to 1.
0 No MTS symbol received on channel A
1 MTS symbol received on channel A
5 TCSB Transmission conflict in symbol window channel B.
0 No transmission conflict detected
1 Transmission conflict in symbol window detected on channel B
4 SBSB Slot boundary violation in symbol window channel B.
0 No slot boundary violation detected
1 Slot boundary violation during symbol window detected on channel B
3 SESB Syntax error in symbol window channel B.
0 No syntax error detected
1 Syntax error during symbol window detected on channel B
1323
SPNU563–May 2014 FlexRay Module
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