TLE7269G

Functional Description

Data Sheet

14

Rev. 1.2, 2007-11-13

4.7

Bus Wake-Up via LIN bus 1 and bus 2

Figure 8

Bus Wake-Up behavior

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

By mode. The TLE7269G wakes-up via a bus Wake-Up event on either the pin BUS1 or BUS2. The bus Wake-

results in a bus Wake-Up event. The mode change to Stand-By mode becomes active with the following rising

edge on the LIN bus. The TLE7269G remains in Sleep mode until it detects a change from dominant to recessive

on the LIN bus (see Figure 8).

In Stand-By mode the TxD1 pin indicates the source of the Wake-Up event, the TxD2 pin remains inactive. A weak

pull-down on the pin TxD1 indicates a bus Wake-Up event (see Figure 4 or Table 2). The RxD1 pin signals if a

Wake-Up event occurred or the power-up event. A “Low” signal on the RxD1 pin reports a local or bus Wake-Up

event, a logical “High“ signal on RxD1 indicates a power-up event. A “Low” signal on the RxD2 pin indicates a

Wake-Up event on the pin BUS2.

V

BUS1 &2

V

BUS,dom

V

BUS,wk

LIN BUS1 or BUS2 Signal

Sleep Mode

Stand-By Mode

INH1/

INH2

t

WK,bus