Rainbow-electronics ATA6625 Manual do Utilizador descarregar pdf (Página 5)

5

4957E–AUTO–10/07

ATA6623/ATA6625

4. Mode of Operation

Figure 4-1. Mode of Operation

Unpowered Mode

V

Batt

= 0V

a: V

S

> 5V

b: V

S

< 4V

c: Bus wake-up event

d: NRES switches to low

Pre-normal Mode

Normal Mode

VCC: 3.3V/5V/50 mA

with undervoltage

monitoring

Communication: ON

VCC: 3.3V/5V/50 mA

with undervoltage monitoring

Communication: OFF

Silent Mode

VCC: 3.3V/5V/50 mA

with undervoltage monitoring

Communication: OFF

Sleep Mode

VCC: switched off

Communication: OFF

Go to silent command

a

TXD = 0

EN = 0

TXD = 1

EN = 0

EN = 1

EN = 1

EN = 1

b

b

b

c + d

d

c

b

Local wake-up event

Go to sleep command

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