ATA6622C_14 Datasheet, PDF (9/29 Pages) ATMEL Corporation – Master and slave operation possible

A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time period (> t_bus) and the following
rising edge at the LIN pin (see Figure 4-3 on page 9) results in a remote wake-up request. The device switches from Silent
Mode to Fail-safe Mode. The remote wake-up request is indicated by a low level at the RXD pin to interrupt the
microcontroller (see Figure 4-3 on page 9). EN high can be used to switch directly to Normal Mode.
Figure 4-3. LIN Wake Up from Silent Mode
Bus wake-up filtering time
t_bus
Fail-safe mode
Normal mode
LIN bus
Node in silent mode
RXD
High
Low
High
TXD
Watchdog
VCC
voltage
regulator
EN
NRES
Watchdog off
Silent mode 3.3V/5V
Start watchdog lead time t_d
Fail safe mode 3.3V/5V
Normal mode
EN High
Undervoltage detection active
ATA6622C/ATA6624C/ATA6626C [DATASHEET]
9
4986O–AUTO–10/14