ATA6824_08 ATMEL [ATMEL Corporation], ATA6824_08 Datasheet - Page 7

• Manufacturer Part Number: ATA6824_08
• Description: High Temperature H-bridge Motor Driver
• Manufacturer: ATMEL [ATMEL Corporation]

5.3
Figure 5-2.
4931E–AUTO–01/08
/RESET
Reset and Watchdog Management
WD
t
res
Timing Diagram of the Watchdog Function
t
d
Figure 5-1.
The voltage difference between the regulator output voltage and the upper reset threshold volt-
age is bigger than 100 mV.
The timing basis of the watchdog is provided by the trimmed internal oscillator. Its period T
adjustable via the external resistor R
The watchdog expects a triggering signal (a rising edge) from the microcontroller at the WD
input within a period time window of T
t
1
Correlation between VCC Output Voltage and Reset Threshold
4.9V
4.1V
t
2
5.15V
4.85V
WD
WD
V
t
1
.
CC1-VtHRESH
.
= V
CC1
V
t
tHRESH
2
V
- V
CC1
tHRESH
t
resshort
t
ATA6824
d
OSC
is
7