Datasheet

915
32142D–06/2013
ATUC64/128/256L3/4U
35.9.4 Brown Out Detector Characteristics
The values in Table 35-26 describe the values of the BODLEVEL in the flash General Purpose
Fuse register.
35.9.5 Supply Monitor 33 Characteristics
Notes: 1. Calibration value can be read from the SM33.CALIB field. This field is updated by the flash fuses after a reset. Refer to SCIF
chapter for details.
2. 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.
Table 35-26. BODLEVEL Values
BODLEVEL Value
Min Typ Max Units
011111 binary (31) 0x1F
1.60
V
100111 binary (39) 0x27
1.69
Table 35-27. BOD Characteristics
Symbol Parameter Condition Min Typ Max Units
V
HYST
BOD hysteresis T = 25C10mV
t
DET
Detection time
Time with VDDCORE <
BODLEVEL necessary to
generate a reset signal
1µs
I
BOD
Current consumption 7 µA
t
STARTUP
Startup time 5 µs
Table 35-28. SM33 Characteristics
Symbol Parameter Condition Min Typ Max Units
V
TH
Voltage threshold Calibrated
(1)
, T = 25C 1.675 1.75 1.825 V
Step size, between adjacent values
in SCIF.SM33.CALIB
(2)
11
mV
V
HYST
Hysteresis
(2)
30
t
DET
Detection time
Time with VDDIN < V
TH
necessary to generate a reset
signal
280 µs
I
SM33
Current consumption Normal mode 17 µA
t
STARTUP
Startup time Normal mode 140 µs