TLE9263QX datasheet(77/164 Pages) INFINEON

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Data Sheet

Rev. 1.1, 2014-09-26

TLE9263QX

LIN Transceiver

11.2.2

LIN Normal Mode

The LIN Transceiver is enabled via SPI in SBC Normal Mode. LIN Normal Mode is designed for normal data

transmission/reception within the LIN network. The Mode is available in SBC Normal Mode and in SBC Stop Mode.

Transmission

The signal from the microcontroller is applied to the TXDLIN input of the SBC. The bus driver switches the

LIN output stage to transfer this input signal to the LIN bus line.

Enabling Sequence

The LIN transceiver requires an enabling time tLIN,EN before a message can be sent on the bus. This means that

the TXDLIN signal can only be pulled LOW after the enabling time. If this is not ensured, then the TXDLIN needs

to be set back to high (=recessive) until the enabling time is completed.

Only the next dominant bit will be transmitted on the bus.

Figure 34 shows different scenarios and explanations for LIN enabling.

Figure 34

LIN Transceiver Enabling Sequence

Reduced Electromagnetic Emission

To reduce electromagnetic emissions (EME), the bus driver controls LIN slopes symmetrically. The configuration

of the different slopes is described in Chapter 11.2.8.

Reception

Analog LIN bus signals are converted into digital signals at RXD via the differential input receiver.

11.2.3

LIN Receive Only Mode

In LIN Receive Only Mode (RXD only), the driver stage is de-activated but reception is still possible. This mode is

accessible by an SPI command and is available in SBC Normal and SBC Stop Mode.

LIN_ BUS

LIN,EN

TXDLIN

LIN

Mode

LIN

NORMAL

LIN OFF

LIN,EN

recessive TXD level

required bevor start of

transmission

tLIN, EN not ensured , no

transmission on bus

Correct sequence ,

Bus is enabled after tLIN, EN

tLIN, EN not ensured ,

no transmission on bus

recessive TXD

level required

Recessive

Dominant

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