Rainbow-electronics ATA6630 Bedienungsanleitung PDF herunterladen (Seite 17)

9117C–AUTO–10/09

ATA6628/ATA6630 [Preliminary]

5. Wake-up Scenarios from Silent or Sleep Mode

5.1 Remote Wake-up via Dominant Bus State

A voltage less than the LIN Pre_Wake detection V

LINL

at the LIN pin activates the internal LIN

receiver and starts the wake-up detection timer.

A falling edge at the LIN pin followed by a dominant bus level V

BUSdom

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 Silent or Sleep Mode to Fail-safe Mode. The VCC voltage regulator is/remains

activated, the INH pin is switched to high, and the internal slave termination resistor is switched

on. The remote wake-up request is indicated by a low level at the RXD pin to generate an inter-

rupt for the microcontroller and a strong pull down at TXD.

5.2 Local Wake-up via Pin WAKE

A falling edge at the WAKE pin followed by a low level maintained for a certain time period

WAKE

) results in a local wake-up request. The device switches to Fail-safe Mode. The internal

slave termination resistor is switched on. The local wake-up request is indicated by a low level at

the TXD pin to generate an interrupt for the microcontroller. When the Wake pin is low, it is pos-

sible to switch to Silent or Sleep Mode via pin EN. In this case, the wake-up signal has to be

switched to high > 10 µs before the negative edge at WAKE starts a new local wake-up request.

5.3 Local Wake-up via Pin KL_15

A positive edge at pin KL_15 followed by a high voltage level for a certain time period (> t

KL_15

)

results in a local wake-up request. The device switches into the Fail-safe Mode. The internal

slave termination resistor is switched on. The extra long wake-up time ensures that no transients

at KL_15 create a wake-up. The local wake-up request is indicated by a low level at the TXD pin

to generate an interrupt for the microcontroller. During high-level voltage at pin KL_15, it is pos-

sible to switch to Silent or Sleep Mode via pin EN. In this case, the wake-up signal has to be

switched to low > 250 µs before the positive edge at KL_15 starts a new local wake-up request.

With external RC combination, the time is even longer.

5.4 Wake-up Source Recognition

The device can distinguish between different wake-up sources (see Table 4-4 on page 15).

The wake-up source can be read on the TXD and RXD pin in Fail-safe Mode. These flags are

immediately reset if the microcontroller sets the EN pin to high (see Figure 4-3 on page 10 and

Figure 4-5 on page 12) and the IC is in Normal mode.

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Rainbow-electronics ATA6630 Bedienungsanleitung Seite 17