TLE9255WLC datasheet(13/100 Pages) INFINEON

13 / 100 page

Data Sheet

Rev. 1.02 2018-02-02

TLE9255W

Modes of Operation

5.1

Normal-operating Mode

In Normal-operating mode all functions of the TLE9255W are available. The TLE9255W can receive data from

the HS CAN bus as well as transmit data to the HS CAN bus.

• The transmitter is active and drives the serial data stream on the TxD input pin to the bus pins CANH, CANL.

• The normal mode receiver is active and converts the signals from the bus to a serial data stream on the RxD

output pin.

• The bus biasing is on.

• The TxD timeout function is enabled (Chapter 6.4).

• The overtemperature protection is enabled (Chapter 6.5).

• The undervoltage detection on VBAT is enabled(Chapter 6.2.1)

• The undervoltage detection on VCC is enabled (Chapter 6.2.2).

• The undervoltage detection on VIO is enabled (Chapter 6.2.4).

• The INH output pin is “high”.

• A valid wake-up pattern is not signalled in the SPI bit WUP (Chapter 5.7.1).

• Only if the selective wake function is enabled (SWK_EN = 1), then the HS CAN bus will be continuously

monitored for a valid WUF (Chapter 5.7.2).

• Local wake-up function is disabled (Chapter 5.7.3).

Conditions for entering the Normal-operating Mode:

• Normal-operating Mode can be entered via an SPI MC command from any mode of operation.

Conditions for leaving the Normal-operating Mode:

•If VIO < VIO_UV AND tVIO_UV_T has expired ANDtsilence has expired, then this triggers a mode change to Sleep

Mode

•If VCC < VCC_UV AND tVCC_UV_T has expired AND tsilence has expired, then this triggers a mode change to Sleep

Mode.

• An SPI MC command triggers a mode change.

Figure 5 shows possible mode changes.

Figure 5

Mode changes in Normal-operating Mode

Normal-operating

Mode

VIO undervoltage

AND

tVIO_UV_T expired

AND

tSilence expired

Sleep Mode

Any Mode

SPI MC

command

SPI MC

command

VCC undervoltage

AND

tVCC_UV_T expired

AND

tSilence expired

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