TSS463B datasheet(31/59 Pages) ATMEL

31 / 59 page

TSS463B

4102E–AUTO–12/04

REAR: Re-Arbitrate command.

This command will, after the current attempt, reset the retry counter and re-arbitrate the

messages to be transmitted in order to find the highest priority message to transmit.

One: Re-arbitrate active

Zero: Re-arbitrate inactive

MSDC: Manual System

Diagnosis Clock.

Rather than using the SDC divider described in Section “SDC Signal (Synchronous

Diagnosis Clock)” , the user can use the manual SDC command to generate a SDC

pulse for the diagnosis system.

This MSDC pulse should be high at least 2 timeslot clocks.

Line Status Register (0x04)

•

Read only register

•

Default value after reset: 0bx01xxx00.

•

This register reports the operation mode of the TSS463B in the Sleep an Idle bits

(Command Register located at address 0

×03) as well as the diagnosis system

status bits Sa to Sc discussed in the section “Diagnosis System” on page 22

SPG: Sleeping

IDG: Idling

Default mode at reset.

Sa, Sb and Sc: Diagnosis

System Status Bits

•

Sa and Sb

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 performed by the diagnosis system, Sc is set.

The only ways 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 TSS463B has chosen an identifier to trans-

mit, and it will continue to make transmission attempt 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).

7654321

XSPG

IDG

TXG

RXG

Communication Indication

Nominal mode, differential communication

Degraded over DATA, fault on DATA

Major error, fault on DATA and DATA

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