ATA6662 Ver la hoja de datos (PDF) - Atmel Corporation
Número de pieza
componentes Descripción
Fabricante
ATA6662 Datasheet PDF : 18 Pages
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Wake-up events from Sleep Mode:
• LIN bus
• EN pin
• WAKE pin
• VS Undervoltage
Figure 3-1 on page 5, Figure 3-2 on page 6 and Figure 3-3 on page 7 show details of wake-up
operations.
3.12
Remote Wake-up via Dominant Bus State
A voltage less than the LIN pre-wake detection VLINL at pin LIN activates the internal LIN
receiver and switches on the internal slave termination between the LIN pin and the VS pin.
A falling edge at pin LIN, followed by a dominant bus level VBUSdom maintained for a certain time
period (tBUS) and a rising edge at pin LIN results in a remote wake-up request. The device
switches to Fail-safe Mode. Pin INH is activated (switches to VS) and the internal termination
resistor is switched on. The remote wake-up request is indicated by a low level at pin RXD to
interrupt the microcontroller (see Figure 3-2 on page 6).
Figure 3-2.
LIN Wake-up Waveform Diagram
Bus wake-up filtering time
(tBUS)
LIN bus
INH
RXD
External
voltage
regulator
EN
Low or floating
High or floating
Off state
Node in sleep state
High
Low
Regulator wake-up time delay
Normal
Mode
EN High
Microcontroller start-up
delay time
6 ATA6662
4916O–AUTO–05/10
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