TLE9255WLC datasheet(46/100 Pages) INFINEON

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Data Sheet

Rev. 1.02 2018-02-02

TLE9255W

CAN Partial Networking

If the selective wake unit detects an invalid classical CAN frame, then the SYNC flag is reset. The SYNC flag has

no influence on the transition to the Sleep Mode by an SPI command. After power up SYNC = 0. The SYNC flag

is not valid in the Selective Sleep Sub-Mode.

7.6.3

CANTO Flag

The CANTO flag in the register SWK_STAT indicates that the TLE9255W has entered Selective Sleep Mode (no

bus communication) at least once. Only if the SPI bit SWK_EN = 1, then the CANTO flag can be set. If the

TLE9255W is in the Selective Sleep Mode AND if the tSilence timer expires, then the CANTO flag is set . Only an

SPI command can reset the CANTO flag .

7.6.4

CANSIL Flag

The CANSIL flag in the register SWK_STAT indicates that there is no communication on the CAN bus (tSilence

timer has expired). Figure 15 defines the restart conditions for the tSilence timer.

7.6.5

SWK_ACTIVE Flag

The SWK_ACTIVE flag in the register SWK_STAT indicates that the TLE9255W is in Selective Wake Sub-Mode. If

the TLE9255W enters the Selective Wake Sub-Mode, then the SWK_ACTIVE flag is set. If the TLE9255W exits

Sleep Mode, then it resets the SWK_ACTIVE flag.

7.6.6

CFG_VAL Flag

The microcontroller sets the CFG_VAL flag in the register SWK_CTRL_1 to confirm the selective wake

configuration. This confirmation must be performed each time before a mode change to Sleep Mode by an SPI

command (Selective Wake Sub-Mode) is sent. The TLE9255W resets the CFG_VAL bit under any of the following

conditions:

• If a mode change from Selective Wake Sub-Mode to Stand-by Mode is performed.

• If a mode change from Selective Sleep Sub-Mode to Stand-by Mode is performed.

• If a selective wake configuration error is detected (Chapter 7.4).

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