Data Sheet

13

Rev. 1.0

2017-09-14

TLE7268

Dual LIN 2.2 / SAE J2602 Transceiver

Functional description

4.5

Wake-up events

A wake-up event on the LIN Bus changes the operation mode for transceiver_x of the TLE7268 from Sleep

mode to Standby mode. There are two different ways to exit Sleep mode:

The TLE7268 changes into Standby mode.

• Mode change by setting the ENx input “high”.

The TLE7268 changes into Normal Operation mode.

4.5.1

Bus wake-up via LIN bus

The bus wake-up, also called remote wake-up, changes the transceivers’ operation mode from Sleep mode to

wake-up event. The mode change to Standby mode is performed with the subsequent rising edge on the LIN

bus. The transceiver_x of TLE7268 remains in Sleep mode until it detects a change from dominant to recessive

on the LIN bus_x (see Figure 8).

In Standby mode a “low” signal on the RxDx output indicates a bus wake-up event of transceiver_x.

Figure 8

Bus wake-up behavior

LIN bus signal

INH

t

t

ENx

t

TxDx

t

RxDx

t

1)

RxDx „low“ indicates

wake-up event on Bus_x

TxDx is high-impedance

1) External pull up resistor is required.

Standby mode

Sleep mode

2) INH is switched off only if both transceivers are in the Sleep mode

2) Et

l

ll d

it

i

i d