ATA6602 ATMEL Corporation, ATA6602 Datasheet - Page 69
ATA6602
Manufacturer Part Number
ATA6602
Description
LIN and Microcontroller System-In-Package: LIN Transceiver, integrated 5V/50 mA voltage regulator, window watchdog and automotive AVR ATmega88 (8 kBytes Flash); green QFN48 package.
Manufacturer
ATMEL Corporation
Datasheet
1.ATA6602.pdf
(362 pages)
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4.8.6
4921C–AUTO–01/07
Watchdog System Reset
Table 4-22.
When the BOD is enabled, and V
4-19), the Brown-out Reset is immediately activated. When V
level (V
expired.
The BOD circuit will only detect a drop in V
longer than t
Figure 4-19. Brown-out Reset During Operation
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On
the falling edge of this pulse, the delay timer starts counting the Time-out period t
“Watchdog Timer” on page 71
Figure 4-20. Watchdog System Reset During Operation
Symbol
V
t
BOD
INTERNAL
HYST
TIME-OUT
TIME-OUT
RESET
RESET
RESET
BOT+
WDT
V
CC
in
BOD
INTERNAL
TIME-OUT
Figure
Brown-out Characteristics
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
RESET
RESET
given in
V
CC
4-19), the delay counter starts the MCU after the Time-out period t
Table 4-20 on page
for details on operation of the Watchdog Timer.
CC
decreases to a value below the trigger level (V
V
1 CK Cycle
BOT
t
TOUT
-
67.
CC
if the voltage stays below the trigger level for
ATA6602/ATA6603
V
Min
t
TOUT
BOT+
CC
increases above the trigger
Typ
50
Max
TOUT
BOT-
. Refer to
in
TOUT
Units
mV
Figure
ns
has
69
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