ATA6622C(2014) データシートの表示（PDF） - Atmel Corporation

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ATA6622C
(Rev.:2014)

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

Atmel Corporation 

4.2 Silent Mode

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

Mode Select window (see Figure 4-2). The transmission path is disabled in Silent Mode. The overall supply current from VBatt

is a combination of the IVSsi = 57µA plus the VCC regulator output current IVCC.

The internal slave termination between the LIN pin and the VS pin is disabled in Silent Mode, only a weak pull-up current

(typically 10µA) between the LIN pin and the VS pin is present. Silent Mode can be activated independently from the actual

level on the LIN, WAKE, or KL_15 pins.

If an undervoltage condition occurs, NRES is switched to low, and the IC changes its state to Fail-safe Mode.

A voltage less than the LIN Pre_Wake detection VLINL at the LIN pin activates the internal LIN receiver and switches on the

internal slave termination between the LIN pin and the VS pin.

Figure 4-2. Switch to Silent Mode

Normal Mode

Silent Mode

EN

TXD

NRES

Mode select window

td = 3.2μs

VCC

LIN

Delay time silent mode

td_silent maximum 20μs

LIN switches directly to recessive mode

8

ATA6622C/ATA6624C/ATA6626C [DATASHEET]

4986O–AUTO–10/14

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