TSS461 ATMEL Corporation, TSS461 Datasheet - Page 29

• Manufacturer Part Number: TSS461
• Description: VAN Data Link Controller
• Manufacturer: ATMEL Corporation

TXG: Transmitting
RXG: Receiving
Transmission Status Register (0x05)
NRT [3:0]: Number of
Retries Done in
Transmission
IDT [3:0]: Channel
Number Currently in
Transmission
Last Message Status Register (0x06)
4194C–AUTO–01/06
Table 8. Diagnosis System Status Bits
•
If this status bit is active, it indicates that the TSS461E has chosen an identifier to transmit, and
it will continue to make transmission attempts for this message until it succeeds or the retry
count is exceeded.
The receiving indicates that there is activity on the bus.
Note:
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•
•
•
•
•
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.
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.
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.
For safe modification of active channel registers both bits should be inactive (except "abort"
command).
NRTR3
NRT3
7
7
Sb
0
0
1
1
NRTR2
NRT2
6
6
Sa
0
1
0
1
NRTR1
NRT1
5
5
Communication Indication
Nominal mode, differential communication
Degraded over DATA, fault on DATA
Degraded over DATA, fault on DATA
Major error, fault on DATA and DATA
NRTR0
NRT0
4
4
IDTR3
IDT3
3
3
IDTR2
IDT2
2
2
IDTR1
IDT1
TSS461E
1
1
IDTR0
IDT0
0
0
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