TLE9255WLC datasheet(19/100 Pages) INFINEON

19 / 100 page

Data Sheet

Rev. 1.02 2018-02-02

TLE9255W

Modes of Operation

5.4.1

Sleep WUP Sub-Mode

Sleep WUP Sub-Mode is a low power mode of the TLE9255W. Sleep WUP Sub-Mode reduces current

consumption. The following conditions are valid for the Sleep WUP Sub-Mode:

• The transmitter is disabled and the data available on the TxD input is blocked.

• The value of the RxD output pin depends on the power supply circuit of VIO.

– Permanent power supply of VIO (INH pin is not used)

The RxD output pin is “high”

– The INH pin controls the power supply of VIO

The RxD output pin is “low”

•If the tSilence timer has expired, then the bus biasing is off.

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

• The overtemperature protection is disabled (Chapter 6.5).

• The undervoltage detection on VBAT (Chapter 6.2.1) is not signalled in the SPI bit VBAT_UV.

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

• The undervoltage detection on VIO (Chapter 6.2.4) is not signalled in the SPI bits VIO_LTUV and VIO_STUV.

• The INH output pin is “low”. The SPI bit VBAT_CON in the register SWK_CTRL_1 controls the behavior of

the INH pin.

• The HS CAN bus is continuously monitored for a valid wake-up pattern (Chapter 5.7.1).

•The HS CAN bus is not monitored for a valid WUF (Chapter 5.7.2).

• Local wake-up function is enabled.

Conditions for entering the Sleep WUP Sub-Mode:

•If VIO < VIO_UV (VIO undervoltage) AND tVIO_UV_T has expired AND tsilence has expired, then the TLE9255W enters

Sleep WUP Sub-Mode.

•If VCC < VCC_UV (VCC undervoltage) AND tVCC_UV_T has expired AND tsilence has expired, then the TLE9255W

enters Sleep WUP Sub-Mode. The SPI bit STTS_EN controls this state transition.

• The Sleep WUP Sub-Mode can be entered via an SPI MC command from any mode of operation.

Conditions for leaving the Sleep WUP Sub-Mode:

• If a wake-up (WUP, LWU) is detected in Sleep WUP Sub-Mode, then the TLE9255W enters Stand-by Mode.

• An SPI MC command triggers a mode change to any mode of operation.

Figure 11

Mode change in Sleep WUP Sub-Mode

Sleep WUP

Sub-Mode

Stand-by Mode

Any Mode

WUP OR LWU

detection

VIO undervoltage

AND

tVIO_UV_T expired

AND

tSilence expired

SPI MC

command

Any Mode

VCC undervoltage

AND

tVCC_UV_T expired

AND

tSilence expired

SPI MC command

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