ATA6621-EK Atmel, ATA6621-EK Datasheet - Page 5

• Manufacturer Part Number: ATA6621-EK
• Description: MCU, MPU & DSP Development Tools Demoboard LIN SBC
• Manufacturer: Atmel

Figure 2-1.
Figure 2-2.
4970B–AUTO–03/11
V
CC
Timing Sequence with R3 = 51k at the Atmel ATA6621
Timing Sequence with R3 = 51k at the Atmel ATA6622/24/26
V
CC
NTRIG
= 3.3V/5V
PTRIG
NRES
= 5V
NTRIG
NRES
Undervoltage Reset
t
For the Atmel
results in the different timing sequence shown in
If you want to change the watchdog times mentioned above it is only necessary to change the
value of the external resistor R3 (refer to the corresponding datasheet).
reset
Undervoltage Reset
t
reset
= 10ms
= 4ms
®
ATA6622/24/26 the resistor R3 at pin WD_OSC with the same value of 51k
t
d
= 49ms
t
d
= 150ms
t
1
= 10ms
t
1
t
= 20ms
trigg
t
t
trigg
> 3µs
wd
t
wd
t
> 200ns
2
= 10.5ms
t
2
= 21ms
Atmel ATA6621/22/24/26
t
Figure
1
t
1
2-2:
t
2
t
2
Watchdog Reset
Watchdog Reset
t
nres
t
nres
= 1.9ms
= 4ms
5