Data Sheet

11

Rev. 1.2, 2007-11-13

TLE7269G

Functional Description

.

Figure 6

Timing to enter Low Slope Mode

4.2.3

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 TLE7269G can be set to Flash mode either from Normal Slope mode or from Low Slope mode (see Figure 4).

Flash mode is entered by setting the EN pin to “Low” for the time

t

the TxD1 pin with the timing

t

the TLE7269G back to its previous state, be that either Normal Slope mode or Low Slope mode. Finally to release

the data transmission it is required to set the TxD1 pin and the TxD2 pin to “High” for the time

t

The TLE7269G can be set from Flash mode directly to Sleep mode by switching the EN pin to “Low”. Setting the

pin EN to “High” again, the device will return to Flash mode.

Figure 7

Timing to enter and exit Flash Mode

t

MODE

Stand-By Mode / Sleep Mode

Low Slope Mode

EN

TxD1

t

TxD,SET

V

EN,ON

Mode

Transition

t

to,rec

Data transmission

Normal Slope Mode

Low Slope Mode

TxD1

EN

t

fl3

Data transmission

t

fl1

Flash Mode

t

fl2

t

fl4

t

fl1

Data transm.

Normal Slope Mode

Low Slope Mode

t

fl3

t

fl2

t

fl4

t

torec

t

torec