TLE7259-2GE Datasheet, PDF(10/31 Page) Infineon Technologies AG

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

TLE7259-2GE Datasheet, PDF (10/31 Pages) Infineon Technologies AG – LIN Transceiver

◁

TLE7259-2GE

Functional Description

4.2.1 Normal Slope Mode

In Normal Slope mode data transmission rates up to 20 kBauds are possible. Setting the EN pin to âHighâ starts

the transition to Normal Slope mode. (see Figure 5).

The mode change to Normal Slope mode is defined by the time tMODE. The time tMODE specifies the delay time

between the threshold, where the EN pin detects a âHighâ input signal, and the actual mode change of TLE7259-

2GE into Normal Slope mode. Entering in Normal Operation mode, the TLE7259-2GE always enters per default

into Normal Slope mode. The signal on the TxD pin is not relevant for entering into Normal Slope mode.

Finally to release the data communication it is required to set the TxD pin to âHighâ for the time tto,rec.

VEN,ON

Donât care

TxD

tMODE

Data transmission

tto,rec

Stand-By Mode / Sleep Mode

Normal Slope Mode

Figure 5 Timing to enter Normal Slope Mode

4.2.2 Flash Mode

In Flash mode it is possible to transmit and receive LIN messages on the LIN bus. The slew rate control

mechanism of the LIN bus signal is disabled. This allows higher data transmission rates, disregarding the EMC

limitations of the LIN network. The Flash mode is intended to be used during the ECU production for programming

the microcontroller via the LIN bus interface.

The TLE7259-2GE can be set to Flash mode only from Normal Slope mode (see Figure 4). Flash mode is entered

by setting the EN pin to âLowâ for the time tfl1 and generating a falling and a rising edge at the TxD pin with the

timing tfl2, tfl3 and tfl4 (see Figure 6). Leaving the Flash mode by the same sequence, sets the TLE7259-2GE back

to Normal Slope mode. Finally to release the data transmission it is required to set the TxD pin to âHighâ for the

time tto,rec.

Additionally the TLE7259-2GE can leave the Flash mode as well by switching only the EN pin to âLowâ. By applying

this âLowâ signal to the EN pin the TLE7259-2GE is put into Sleep mode.

Data Sheet

Rev. 1.1, 2008-09-05

▷