ATA6620N データシートの表示（PDF） - Atmel Corporation

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ATA6620N

LIN Bus Transceiver with Integrated Voltage Regulator

Atmel Corporation 

ATA6620N

4. Mode of Operation

Figure 4-1. Mode of Operation

Unpowered Mode

VBatt = 0

b

a

Pre-normal Mode

VCC: 5V/2%/50 mA with undervoltage

b

monitoring

Communication: OFF

d

EN = 1

Normal Mode

VCC: 5V/2%/50 mA

with undervoltage

monitoring

Communication: ON

EN = 0

TXD = 1

EN = 1

EN = 0

TXD = 0

EN = 1

Go to silent command

Local wake-up event

Go to sleep command

Local wake-up event

a: VS > 5V

b: VS < 4V

c: Bus wake-up event

d: NRES switches to low

b

c+d

c

b

Silent Mode

VCC: 5V/7%/50 mA

with undervoltage monitoring

Communication: OFF

Sleep Mode

VCC: switched off

Communication: OFF

Table 4-1. Mode of Operation

Mode of

Operation

Communication

VCC

RXD

LIN

Pre-normal

OFF

5V

5V

Recessive

Normal

ON

5V

5V

Recessive

Silent

OFF

5V

5V

Recessive

Sleep

OFF

0V

0V

Recessive

4.1 Normal Mode

This is the normal transmitting and receiving mode of the LIN Interface, in accordance with LIN

specification 2.0. The VCC voltage regulator operates with a 5V output voltage, with a low toler-

ance of ±2% and a maximum output current of 50 mA.

If an undervoltage condition occurs, NRES is switched to low and the ATA6620N changes state

to Pre-normal mode. All features are available.

5

4850I–AUTO–09/09

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