ATA6622C(2014) 데이터 시트보기 (PDF) - Atmel Corporation

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ATA6622C
(Rev.:2014)

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

Atmel Corporation 

4. Modes of Operation

Figure 4-1. Modes of Operation

b

e

Unpowered Mode

VBatt = 0V

b

a

Fail-safe Mode

VCC: 3.3V/5V

with undervoltage monitoring

Communication: OFF

Watchdog: ON

a: VS > 5V

b: VS < 3.7V

c: Bus wake-up event

d: Wake up from WAKE or KL_15 pin

e: NRES switches to low

b

b

c+d+e

EN = 1

Normal Mode

VCC: 3.3V/5V

with undervoltage

monitoring

Communication: ON

Watchdog: ON

EN = 0

TXD = 1

EN = 1

EN = 0

TXD = 0

Go to silent command

Local wake-up event

Go to sleep command

EN = 1

c+d

Silent Mode

VCC: 3.3V/5V

with undervoltage monitoring

Communication: OFF

Watchdog: OFF

Sleep Mode

VCC: switched off

Communication: OFF

Watchdog: OFF

Table 4-1. Table of Modes

Mode of

Operation

Transceiver

Fail-safe

Off

Normal

On

Silent

Off

Sleep

Off

VCC

3.3V/5V

3.3V/5V

3.3V/5V

0V

Watchdog WD_OSC INH

On

1.23V On

On

1.23V On

Off

0V

Off

Off

0V

Off

RXD

High,

except after wake-up

LIN depending

High

0V

LIN

Recessive

TXD

depending

Recessive

Recessive

4.1 Normal Mode

This is the normal transmitting and receiving mode of the LIN Interface in accordance with the LIN specification LIN 2.x. The

voltage regulator is active and can source up to 85mA. The undervoltage detection is activated. The watchdog needs a

trigger signal from NTRIG to avoid resets at NRES. If NRES is switched to low, the IC changes its state to Fail-safe Mode.

ATA6622C/ATA6624C/ATA6626C [DATASHEET]

7

4986O–AUTO–10/14

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