ATA6602 Datasheet, PDF (71/362 Pages) ATMEL Corporation – Microcontroller with LIN Transceiver, 5V Regulator and Watchdog

ATA6602/ATA6603
4.8.9
Table 4-23. Internal Voltage Reference Characteristics⁽¹⁾
Symbol Parameter
Condition Min Typ Max Units
V_BG
Bandgap reference voltage
t_BG
Bandgap reference start-up time
I_BG
Bandgap reference current consumption
TBD
TBD
TBD
1.0 1.1 1.2
V
40 70
µs
10 TBD µA
Note: 1. Values are guidelines only. Actual values are TBD.
Watchdog Timer
ATA6602/ATA6603 has an Enhanced Watchdog Timer (WDT). The main features are:
• Clocked from separate On-chip Oscillator
• 3 Operating modes
– Interrupt
– System Reset
– Interrupt and System Reset
• Selectable Time-out period from 16 ms to 8s
• Possible Hardware fuse Watchdog always on (WDTON) for fail-safe mode
Figure 4-21. Watchdog Timer
128kHz
OSCILLATOR
WATCHOG
PRESCALER
WATCHDOG
RESET
WDE
WDP0
WDP1
WDP2
WDP3
MCU RESET
WDIF
WDIE
INTERRUPT
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.
71
4921C–AUTO–01/07