ATA6626 ATMEL Corporation, ATA6626 Datasheet - Page 9

• Manufacturer Part Number: ATA6626
• Description: (ATA6622 - ATA6626) LIN Bus Transceiver
• Manufacturer: ATMEL Corporation

4.3
4986F–AUTO–07/08
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Sleep Mode
Figure 4-3.
A falling edge at EN when TXD is low switches the IC into Sleep Mode. The TXD Signal has to
be logic low during the Mode Select window
disabled in Sleep Mode. The supply current I
The VCC regulator is switched off. NRES and RXD are low. The internal slave termination
between the LIN pin and VS pin is disabled to minimize the power dissipation in the event that
the LIN pin is short-circuited to GND. Only a weak pull-up current (typically 10 µA) between the
LIN pin and the VS pin is present. Sleep Mode can be activated independently from the current
level on the LIN, WAKE, or KL_15 pin.
A voltage less than the LIN Pre_Wake detection VLINL at the LIN pin activates the internal LIN
receiver.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
device switches from Sleep Mode to Fail-safe Mode.
Watchdog
regulator
voltage
LIN bus
VCC
NRES
TXD
RXD
EN
bus
Node in silent mode
) and a rising edge at pin LIN respectively result in a remote wake-up request. The
LIN Wake Up from Silent Mode
Bus wake-up filtering time
Silent mode 3.3V/5V/50 mA
Watchdog off
t
High
bus
Undervoltage detection active
ATA6622/ATA6624/ATA6626
VSsleep
(Figure 4-4 on page
Fail safe mode 3.3V/5V/50 mA
from V
Start watchdog lead time t
Fail-safe mode
Batt
is typically 10 µA.
Low
10). The transmission path is
d
Normal mode
EN High
Normal mode
High
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