Datasheet

29.6. System and reset characteristics
Table 29-4. Reset, brown-out
(1)
and internal voltage
(1)
characteristics.
Symbol Parameter Min Typ Max Units
V
POT
Power-on Reset Threshold Voltage (rising) 1.1 1.4 1.7 V
Power-on Reset Threshold Voltage (falling)
(2)
0.8 0.9 1.6
V
PORMAX
V
CC
maximum start voltage to ensure internal
Power-on Reset signal
0.4
V
PORMIN
V
CC
minimum start voltage to ensure internal
Power-on Reset signal
-0.1
V
CCRR
V
CC
Rise Rate to ensure Power-on Reset 0.01 V/ms
VRST RESET Pin Threshold Voltage 0.1V
CC
0.9V
CC
V
V
HYST
Brown-out Detector Hysteresis 50 mV
t
BOD
Min Pulse Width on Brown-out Reset 2 μs
VBG Bandgap reference voltage 1.1 V
tBG Bandgap reference start-up time 40 μs
IBG Bandgap reference current consumption 15 μA
1. Note: Values are guidelines only.
2. Note:
Before rising, the supply has to be between V
PORMIN
and V
PORMAX
to ensure a reset.
Table 29-5. BODLEVEL fuse coding
(1) (2)
.
BODLEVEL 2..0 fuses Typ V
BOT
Units
111 Disabled
110 4.5 V
011 4.4
100 4.3
010 4.2
001 2.8
101 2.7
000 2.6
1. Note: V
BOT
may be below nominal minimum operating voltage for some devices. For devices
where this is the case, the device is tested down to V
CC
= V
BOT
during the production test. This
guarantees that a Brown-Out Reset will occur before V
CC
drops to a voltage where correct
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 010 for Low Operating Voltage and BODLEVEL = 101 for High Operating Voltage.
2. Note: Values are guidelines only.
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016
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