TSS461C datasheet(29/57 Pages) ATMEL

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TSS461C

4193G–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 TSS461C 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.

Communication Indication

Nominal mode, differential communication

Degraded over DATA, fault on DATA

Major error, fault on DATA and DATA

7654321

NRT3

NRT2

NRT1

NRT0

IDT3

IDT2

IDT1

IDT0

7654321

NRTR3

NRTR2

NRTR1

NRTR0

IDTR3

IDTR2

IDTR1

IDTR0

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