ATA6602 Ver la hoja de datos (PDF) - Atmel Corporation

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ATA6602

Microcontroller with LIN Transceiver, 5V Regulator and Watchdog

Atmel Corporation 

3.3.13 Modes of Operation

Figure 3-2. Modes of Operation

Unpowered Mode

VBatt = 0

b

a

a: VS > 5V

b: VS < 4V

c: Bus wake-up event

d: NRES switches to low

e: Wake-up from wake-up switch

Pre-normal Mode

VCC: 5V/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

b

c+d+e

c+e

b

Silent Mode

VCC: 5V ±7%/50 mA

with undervoltage monitoring

Communication: OFF

Sleep Mode

VCC: switched off

Communication: OFF

3.3.13.1

3.3.13.2

Normal Mode

This is the normal transmitting and receiving mode. The voltage regulator is in normal mode and

can source 50 mA. The undervoltage detection is activated. The watchdog needs a trigger

signal from PTRIG or NTRIG to avoid resets at NRES.

Silent Mode

A falling edge at EN while TXD is high switches the IC into Silent Mode. The TXD signal has to

be logic high during the Mode Select window (see Figure 3-3 on page 9). For EN and TXD either

two independent outputs can be used, or two outputs from the same microcontroller port; in the

second case, the mode change is only one command. In Silent Mode, the transmission path is

disabled. Supply current from VBat is typically IVSsi = 40 µA with no load at the VDD regulator.

The overall supply current from VBat is the addition of 40 µA plus the VDD regulator output current

IVDDs.

8 ATA6602/ATA6603

4921C–AUTO–01/07

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