Rainbow-electronics ATA6670 Manual de usuario descargar pdf (Pagina 8)

9204C–AUTO–09/11

Atmel ATA6670 [Preliminary]

Figure 3-3. Floating LIN Bus During Sleep Mode

If the Atmel

ATA6670 is in sleep mode and the voltage level at the LIN is in dominant state

LIN

BUSdom

) for a period of time exceeding t

mon

(during a short circuit at LIN, for example),

the IC switches back to sleep mode. The VS current consumption then consists of I

VSsleep

plus

LINWAKE

. After a positive edge at pin LIN the IC switches directly to fail-safe mode (see Figure

3-4).

Figure 3-4. Short-circuit to GND on the LIN Bus During Sleep Mode

VSsleep

VSfail

+ I

LINwake

VSsleep

BUSdom

LINL

mon

LIN Pre-wake

LIN dominant state

LIN BUS

Mode of

operation

Int. Pull-up

Resistor

RLIN

Wake-up Detection Phase

off (disabled)

Sleep Mode Sleep Mode

Sleep Mode

VSsleep

VSfail

+ I

LINwake

VSsleep

BUSdom

LINL

LIN Pre-wake

LIN dominant state

LIN BUS

Mode of

operation

Int. Pull-up

Resistor

RLIN

off (disabled) on (enabled)

Wake-up Detection PhaseSleep Mode Fail-Safe Mode

mon

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 19 20

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Rainbow-electronics ATA6670 Manual de usuario Pagina 8

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