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TSS461E
4194B–AUTO–12/04
Table 8.
Diagnosis System Status Bits
Sc: As soon as one of the three inputs (RXD2, RXD1, RXD0) differs from the others
in the input comparison analysis perform by the diagnosis system, S2 is set.
The only way to reset this status bit is through the RI signal or a general reset.
TXG: Transmitting
If this status bit is active, it indicates that the TSS461E has chosen an identifier to trans-
mit, and it will continue to make transmission attempts for this message until it succeeds
or the retry count is exceeded.
RXG: Receiving
The receiving indicates that there is activity on the bus.
Note:
For safe modification of active channel registers both bits should be inactive (except
"abort" command).
Transmission Status Register (0x05)
Read only register.
Default value after reset: 0x00.
The transmission Status register contains the number of retries made up-to-date,
according to Table 3, and the channel currently in transmission.
NRT [3:0]: Number of Retries
Done in Transmission
IDT [3:0]: Channel Number
Currently in Transmission
Last Message Status Register (0x06)
Read only register.
Default value after reset: 0x00.
This register is the same as the transmission status register. It contains the last
identifier number that was successfully transmitted, received or exceeded its retry
count.
If it was a successful transmission, the number of retries performed can be seen in
this register as well.
Sb
Sa
Communication Indication
0
0
Nominal mode, differential communication
0
1
Degraded over DATA, fault on DATA
1
0
Degraded over DATA, fault on DATA
1
1
Major error, fault on DATA and DATA
7
6
5
4
3
2
1
0
NRT3
NRT2
NRT1
NRT0
IDT3
IDT2
IDT1
IDT0
7
6
5
4
3
2
1
0
NRTR3
NRTR2
NRTR1
NRTR0
IDTR3
IDTR2
IDTR1
IDTR0