TLE9255WLC datasheet(22/100 Pages) INFINEON

22 / 100 page

Data Sheet

Rev. 1.02 2018-02-02

TLE9255W

Modes of Operation

5.4.3

Selective Sleep Sub-Mode

Selective Sleep Sub-mode is a low power mode with optimized quiescent current. The following conditions

are valid for the Selective Wake Sub-Mode:

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

• The default 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”

• 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), but a valid wake-up

pattern is not signalled in the SPI bit WUP (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 Selective Sleep Sub-Mode:

• If there is no communication on the HS CAN bus for longer than tSilence in the Selective Wake Sub-Mode,

then the TLE9255W enters the Selective Sleep Sub-Mode.

Conditions for leaving the Selective Sleep Sub-Mode:

• If a WUP is detected, then Selective Wake Sub-Mode is entered.

• If an LWU has been detected, then Stand-by Mode will be entered.

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

Figure 13

Mode change in Selective Sleep Sub-Mode

Selective Sleep

Sub-Mode

(WUF detection in SPI

configured)

Selective Wake

Sub-Mode

Any Mode

Selective Wake

Sub-Mode

tSilence expired

WUP detection

LWU detection

Stand-by Mode

SPI MC

command

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