ata6603 ATMEL Corporation, ata6603 Datasheet - Page 8

• Manufacturer Part Number: ata6603
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

3.3.14
Figure 3-2.
3.3.14.1
3.3.14.2
8
VCC: 5V 2%/50 mA
with undervoltage
monitoring
Communication: ON
ATA6602/ATA6603
Modes of Operation
Normal Mode
Normal Mode
Silent Mode
Modes of Operation
b
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.
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
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 V
The overall supply current from V
I
d
EN = 1
VDDs
.
TXD = 1
TXD = 0
EN = 0
EN = 1
EN = 0
VCC: 5V/50 mA with undervoltage
Communication: OFF
EN = 1
monitoring
Pre-normal Mode
Go to silent command
Go to sleep command
Unpowered Mode
Local wake-up event
Local wake-up event
b
V
Batt
= 0
a
Bat
Bat
is typically I
is the addition of 40 µA plus the V
c + e
Communication: OFF
VSsi
VCC: switched off
= 40 µA with no load at the VDD regulator.
Figure 3-3 on page
Sleep Mode
b
c + d + e
a: V
b: V
c: Bus wake-up event
d: NRES switches to low
e: Wake-up from wake-up switch
b
VCC: 5V 7%/50 mA
with undervoltage monitoring
Communication: OFF
S
S
> 5V
< 4V
Silent Mode
DD
9). For EN and TXD either
regulator output current
4921D–AUTO–08/07