ATA6824-MFHW Atmel, ATA6824-MFHW Datasheet - Page 7

• Manufacturer Part Number: ATA6824-MFHW
• Description: IC MOTOR DVR H-BRIDGE 32TPQFP
• Manufacturer: Atmel

Specifications of ATA6824-MFHW

• Applications: DC Motor Controller
• Number Of Outputs: 1
• Voltage - Supply: 6.5 V ~ 21.3 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.3
Figure 5-3.
4931L–AUTO–02/11
/RESET
Reset and Watchdog Management
WD
t
res
Timing Diagram of the Watchdog Function
t
d
Figure 5-1.
Figure 5-2.
The voltage difference between the regulator output voltage and the upper reset threshold
voltage is bigger than 75mV (VMODE = HIGH) and bigger than 50mV (VMODE = LOW).
The timing basis of the watchdog is provided by the trimmed internal oscillator. Its period T
is 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
4.9V
4.1V
Voltage Dependence and Timing of VCC Controlled RESET
Correlation between VCC Output Voltage and Reset Threshold
VCC
5.15V
4.85V
/RESET
V
VCC
tHRES
t
2
5V
V
CC1-VtHRESH
t
1
WD
T
WD
res
= V
.
.
CC1
- V
V
tHRESH
tHRESH
V
CC1
t
2
T
delayRESL
t
resshort
Atmel ATA6824
Tracking voltage
V
CC1-tHRESH
t
d
OSC
7