ATA6629-TAPY データシートの表示（PDF） - Atmel Corporation

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ATA6629-TAPY

LIN Bus Transceiver with Integrated Voltage Regulator

Atmel Corporation 

ATA6629/ATA6631

A voltage less than the LIN Pre-wake detection VLINL at pin LIN 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 maintained for a certain time

period (tbus) and the following rising edge at pin LIN (see Figure 4-3 on page 7) results in a

remote wake-up request which is only possible if TXD is high. The device switches from Silent

Mode to Fail-safe Mode, then the internal LIN slave termination resistor is switched on. The

remote wake-up request is indicated by a low level at pin RXD and TXD to interrupt the micro-

controller (Figure 4-3 on page 7). EN high can be used to switch directly to Normal Mode.

Figure 4-3.

LIN Wake-up Waveform Diagram from Silent Mode

Bus wake-up filtering time

tbus

Fail-safe mode

Normal mode

LIN bus

RXD

High

Low

TXD

High

High

VCC

Silent mode 3.3V/5V/50 mA

EN

Fail-safe mode 3.3V/5V/50 mA Normal mode

EN High

NRES

Undervoltage detection active

7

9165B–AUTO–05/10

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