TLE9255WLC datasheet(41/100 Pages) INFINEON

41 / 100 page

Data Sheet

Rev. 1.02 2018-02-02

TLE9255W

CAN Partial Networking

Figure 37

CAN ID and CAN ID mask

The registers SWK_ID0_CTRL, SWK_ID1_CTRL, SWK_ID2_CTRL and SWK_ID3_CTRL configure the CAN ID. The

IDE bit defines the CAN ID format (11 bit or 29 bit identifier).

The

registers

SWK_MASK_ID0_CTRL,

SWK_MASK_ID1_CTRL,

SWK_MASK_ID2_CTRL

and

SWK_MASK_ID3_CTRL configure the CAN-ID mask.

7.1.2

DLC and data field evaluation

If all of the following conditions are fulfilled, then the DLC and data field evaluation is successful:

• the DLC of the received CAN frame is equal to the DLC configured in the DLC field of the register

SWK_DLC_CTRL

• At least one bit within the data field of the received CAN frame is “1” and matches to a bit (“1”) of the

configured data field. If one bit matches, then the evaluation is stopped. The registers SWK_DATA0_CTRL,

SWK_DATA1_CTRL, SWK_DATA2_CTRL, SWK_DATA3_CTRL, SWK_DATA4_CTRL, SWK_DATA5_CTRL,

SWK_DATA6_CTRL and SWK_DATA7_CTRL configure the data field.

Figure 38 shows an example for the data field evaluation. The DLC in this example is 1.

Figure 38

Data field evaluation

Configured CAN ID

CAN ID mask

st valid WUF CAN ID

nd valid WUF CAN ID

Example of an invalid

WUF CAN ID

Data byte 0

Configured data mask

Received CAN data bytes

Data matches.

The evaluation

process can be

stopped

These bits can be

ignored

time

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