ATA6628 データシートの表示（PDF） - Atmel Corporation

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ATA6628

LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog

Atmel Corporation 

4.3 Sleep Mode

A falling edge at EN when TXD is low switches the IC into Sleep Mode. The TXD Signal has to be logic low during the Mode

Select window (Figure 4-4 on page 10). In order to avoid any influence to the LIN-pin during switching into sleep mode it is

possible to switch the EN up to 3.2µs earlier to Low than the TXD. The best and easiest way are two falling edges at TXD

and EN at the same time. The transmission path is disabled in Sleep Mode. The supply current IVSsleep from VBatt is typically

10µA.

The INH output, the PV output and the VCC regulator are switched off. NRES and RXD are low. The internal slave

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

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

Mode can be activated independently from the current level on the LIN, WAKE, or KL_15 pin.

A voltage less than the LIN Pre_Wake detection VLINL at the LIN pin activates the internal LIN receiver and starts the wake-

up detection timer.

Figure 4-4. Switch to Sleep Mode

Normal Mode

Sleep Mode

EN

TXD

NRES

VCC

LIN

Mode select window

td = 3.2μs

Delay time sleep mode

td_sleep = maximum 20μs

LIN switches directly to recessive mode

10 ATA6628/ATA6630 [DATASHEET]

9117I–AUTO–10/14

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