Rainbow-electronics ATA6630 Uživatelský manuál stáhnout pdf (Strana 12)

9117C–AUTO–10/09

ATA6628/ATA6630 [Preliminary]

A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time

period (t

bus

) and a rising edge at pin LIN result in a remote wake-up request. The device

switches from Sleep Mode to Fail-safe Mode.

The VCC regulator is activated, and the internal LIN slave termination resistor is switched on.

The remote wake-up request is indicated by a low level at the RXD pin to interrupt the microcon-

troller (see Figure 4-5 on page 12).

EN high can be used to switch directly from Sleep/Silent to Fail-safe Mode. If EN is still high after

VCC ramp up and undervoltage reset time, the IC switches to the Normal Mode.

Figure 4-5. LIN Wake Up from Sleep Mode

Regulator wake-up time

Off state

On state

Low

Fail-safe Mode Normal Mode

EN High

Microcontroller

Reset

time

Low or floating

Floating

Watchdog

NRES

VCC

voltage

regulator

RXD

LIN bus

Bus wake-up filtering time

bus

TXD

Watchdog off Start watchdog lead time t

start-up time delay

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 33 34

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Rainbow-electronics ATA6630 Uživatelský manuál Strana 12