TLE7259-3 Datasheet, PDF (12/32 Pages) Infineon Technologies AG – LIN Transceiver

TLE7259-3
Functional Description
TLE7259-3 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
WK Signal
V_WK
V_WK,L
t_WK
Sleep Mode
Stand-By Mode
INH
Figure 8 Local wake-up behavior
Beside the remote wake-up, a wake-up of the TLE7259-3 via the WK pin is possible. This type of wake-up event
is called “Local Wake Up”. A falling edge on the WK pin followed by a “Low“ signal for t > t_WK results in a 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 local 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.
Data Sheet
12
Rev. 1.0, 2013-08-13