atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 300

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

28.5
Table 28-4.
Notes:
Table 28-5.
Note:
300
Symbol
V
V
V
V
POT
t
t
V
t
I
RST
BOD
HYST
PSR
RST
BG
BG
BG
System and Reset Characteristics
1. The Power-on Reset will not work unless the supply voltage has been below V
1. V
(1)
ATmega325/3250/645/6450
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 10 for ATmega325/3250/645/6450 and BODLEVEL = 01 for ATmega325/3250/645/6450V.
BODLEVEL 2:0 Fuses
BOT
Reset, Brown-out and Internal Voltage Reference Characteristics
BODLEVEL Fuse Coding
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
Power-on Slope Rate
RESET Pin Threshold Voltage
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
11
10
01
00
CC
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
Min V
(1)
BOT
V
V
V
T
T
CC
CC
CC
A
A
= 2.7V, T
= 2.7V, T
= 2.7V, T
= -40°C to 85°C
= -40°C to 85°C
Condition
V
V
CC
CC
= 3V
= 3V
Typ V
A
A
A
= 25°C
= 25°C
= 25°C
1.8
2.7
4.3
BOD Disabled
BOT
POT
0.2V
(falling)
0.05
0.01
Min
0.7
1.0
CC
Max V
Typ
800
0.9
1.1
1.0
50
40
15
2
BOT
0.85V
Max
1.4
1.3
4.5
1.2
70
2570L–AVR–08/07
CC
CC
Units
drops to
V
Units
V/ms
mV
µA
ns
µs
µs
V
V
V
V