ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 71

• Manufacturer Part Number: ATA6602-PLQW
• Description: Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
• Manufacturer: ATMEL [ATMEL Corporation]

4.8.9
4921C–AUTO–01/07
Watchdog Timer
Table 4-23.
Note:
ATA6602/ATA6603 has an Enhanced Watchdog Timer (WDT). The main features are:
Figure 4-21. Watchdog Timer
The Watchdog Timer (WDT) is a timer counting cycles of a separate on-chip 128 kHz oscillator.
The WDT gives an interrupt or a system reset when the counter reaches a given time-out value.
In normal operation mode, it is required that the system uses the WDR - Watchdog Timer Reset
- instruction to restart the counter before the time-out value is reached. If the system doesn't
restart the counter, an interrupt or system reset will be issued.
• Clocked from separate On-chip Oscillator
• 3 Operating modes
• Selectable Time-out period from 16 ms to 8s
• Possible Hardware fuse Watchdog always on (WDTON) for fail-safe mode
Symbol
V
t
I
BG
BG
BG
– Interrupt
– System Reset
– Interrupt and System Reset
1. Values are guidelines only. Actual values are TBD.
Parameter
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
WATCHDOG
RESET
OSCILLATOR
Internal Voltage Reference Characteristics
128kHz
WDIE
WDIF
WDE
PRESCALER
WATCHOG
Condition
TBD
TBD
TBD
(1)
ATA6602/ATA6603
Min
1.0
WDP0
WDP1
WDP2
WDP3
MCU RESET
INTERRUPT
Typ
1.1
40
10
Max
TBD
1.2
70
Units
µA
µs
V
71