ATA6631-TAPY データシートの表示（PDF） - Atmel Corporation

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ATA6631-TAPY

LIN Bus Transceiver with Integrated Voltage Regulator

Atmel Corporation 

4.3 Sleep Mode

A falling edge at EN while TXD is low switches the IC into Sleep Mode. The TXD Signal has to

be logic low during the Mode Select window (Figure 4-5 on page 9).

Figure 4-4. Switch to Sleep Mode

Normal Mode

Sleep Mode

EN

TXD

NRES

Mode select window

td = 3.2 µs

VCC

Delay time sleep mode

td_sleep = maximum 20 µs

LIN

LIN switches directly to recessive mode

In order to avoid any influence to the LIN-pin during switching into sleep mode it is possible to

switch the EN up to 3.2 µs earlier to Low than the TXD. Therefore, the best an easiest way are

two falling edges at TXD and EN at the same time.

In Sleep Mode the transmission path is disabled. Supply current from VBatt is typically

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

termination between pin LIN and pin VS is disabled to minimize the current consumption in case

pin LIN is short-circuited to GND. Only a weak pull-up current (typically 10 µA) between pin LIN

and pin VS is present. The Sleep Mode can be activated independently from the current level on

pin LIN.

8 ATA6629/ATA6631

9165B–AUTO–05/10

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