Data Sheet

13

Rev. 1.1, 2008-09-05

TLE7259-2GE

Functional Description

The bus Wake-Up event, often called remote Wake-Up, changes the operation mode from Sleep mode to Stand-

event. The mode change to Stand-By mode becomes active with the following rising edge on the LIN bus. The

TLE7259-2GE remains in Sleep mode until it detects a change from dominant to recessive on the LIN bus (see

Figure 7).

In Stand-By mode the TxD pin indicates the source of the Wake-Up event. A weak pull-down on the pin TxD

indicates a bus Wake-Up event (see Figure 4). The RxD pin signals if a Wake-Up event occurred or the power-

up event. A “Low” signal on the RxD pin reports a local or bus Wake-Up event, a logical “High“ signal on RxD

indicates a power-up event.

4.7

Local Wake-Up

Figure 8

Local Wake-Up behavior

Beside the remote Wake-Up, a Wake-Up of the TLE7259-2GE via the WK pin is possible. This type of wake-up

local Wake-Up (see Figure 8) and changes the operation mode to Stand-By mode.

In Stand-By mode the TxD pin indicates the source of the Wake-Up event. A strong pull-down on the pin TxD

indicates a bus Wake-Up event (see Figure 4). The RxD pin signals if a Wake-Up event or the Power-Up event

occurred. A “Low” signal on the RxD pin reports a local or bus Wake-Up event, a logical “High“ signal on RxD

indicates a Power-Up event.

V

WK

V

WK,L

WK Signal

Sleep Mode

Stand-By Mode

INH

t

WK