Datasheet

913
32142D–06/2013
ATUC64/128/256L3/4U
35.9.2 Power-on Reset 18 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 35-6. POR18 Operating Principle
Table 35-24. POR18 Characteristics
Symbol Parameter Condition Min Typ Max Units
V
POT+
Voltage threshold on V
VDDCORE
rising 1.45 1.58
V
V
POT-
Voltage threshold on V
VDDCORE
falling 1.2 1.32
t
DET
Detection time
(1)
Time with VDDCORE < V
POT-
necessary to generate a reset
signal
460 µs
I
POR18
Current consumption 4 µA
t
STARTUP
Startup time
(1)
6µs
Reset
V
VDDCORE
V
POT+
V
POT-
Time