TLE7259G_07 Datasheet, PDF (8/27 Pages) Infineon Technologies AG – LIN Transceiver

4.6
Bus Wake-up
V_BUS
LIN Bus Signal
V_BUS,dom
t_WK,bus
TLE7259G
Functional Description
V_BUS,wk
Sleep Mode
Stand-By Mode
INH
Figure 4 Bus wake-up behavior
The bus wake-up, often called remote wake-up, changes the operation mode from Sleep mode to Stand-By mode.
A falling edge on the LIN bus, followed by a dominate bus signal t > t_WK,bus results in a bus wake-up. The mode
change to Stand-By mode becomes active with the following rising edge on the LIN bus. The TLE7259G remains
in Sleep mode until it detects a change from dominate to recessive on the LIN bus (see Figure 4).
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 3). The RxD pin signals if a wake-up event occurred or the power-up
event. A logical “Low” on the RxD pin reports a local or bus wake-up event, a logical “High“ signal on RxD indicates
a power-up event.
Data Sheet
8
Rev 2.1, 2007-04-27