Datasheet

914
32142D–06/2013
ATUC64/128/256L3/4U
35.9.3 Power-on Reset 33 Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
Figure 35-7. POR33 Operating Principle
Table 35-25. POR33 Characteristics
Symbol Parameter Condition Min Typ Max Units
V
POT+
Voltage threshold on V
VDDIN
rising 1.49 1.58
V
V
POT-
Voltage threshold on V
VDDIN
falling 1.3 1.45
t
DET
Detection time
(1)
Time with VDDIN < V
POT-
necessary to generate a reset
signal
460 µs
I
POR33
Current consumption 20 µA
t
STARTUP
Startup time
(1)
400 µs
Reset
V
VDDIN
V
POT+
V
POT-
Time