ATA6602(2009) 데이터 시트보기 (PDF) - Atmel Corporation

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ATA6602
(Rev.:2009)

Microcontroller with LIN Transceiver, 5V Regulator and Watchdog

Atmel Corporation 

Figure 3-4. LIN Wake-up Waveform Diagram from Silent Mode

Pre-normal Mode

LIN Bus

VLIN < 0.4 VS

TXD

High

Normal Mode

RXD

VCC

High

Bus wake-up filtering time

tbus

Silent mode

Low

Pre-normal mode

EN

Node in Silent mode

Regulator Wake-up time

Normal mode

EN High

NRES If undervoltage, switch to Pre-normal Mode

Undervoltage detection active

3.3.14.3

Sleep Mode

The falling edge at EN has to occure not more than tDOMmin = 6 ms after or 3.2 µs before the fall-

ing edge at TXD in order to switch the IC into Sleep mode. The TXD Signal has to stay logic

low during the Mode Select window (see Figure 3-5 on page 11 and section “Silent Mode” on

page 8).

In Sleep mode the transmission path is disabled. Supply current from VBat is typically

IVSsleep = 10 µA. The VDD regulator is switched off. NRES and RXD are low. The internal slave

termination between pin LIN and pin VS is disabled to minimize the power dissipation in case pin

LIN is shorted to GND. Only a weak pull-up current (typically 10 µA) between pin LIN and pin VS

is present.

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

(tbus) results in a remote wake-up request. The device switches from Sleep mode to Pre-normal

mode. The VDD 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 pin RXD to interrupt the microcon-

troller (see Figure 3-6 on page 12).

10 ATA6602/ATA6603

4921E–AUTO–09/09

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