ata6603 ATMEL Corporation, ata6603 Datasheet - Page 70

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

4.8.6
70
ATA6602/ATA6603
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 72
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
-
68.
CC
if the voltage stays below the trigger level for
V
Min
t
TOUT
BOT+
CC
increases above the trigger
Typ
50
Max
4921D–AUTO–08/07
TOUT
BOT-
. Refer to
in
TOUT
Units
mV
Figure
ns
has