ATMEGA644PV ATMEL [ATMEL Corporation], ATMEGA644PV Datasheet - Page 329

• Manufacturer Part Number: ATMEGA644PV
• Description: 8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

26.4
Table 26-5.
Notes:
Table 26-6.
Note:
26.5
Table 26-7.
8011D–AVR–02/07
Symbol
Symbol
V
t
V
V
INT
t
t
V
t
I
RST
BOD
HYST
POT
RST
BG
BG
BG
System and Reset Characteristics
1. Values are guidelines only. Actual values are TBD.
2. The Power-on Reset will not work unless the supply voltage has been below V
1. V
External Interrupts Characteristics
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110 for ATmega164P/324P/644P and BODLEVEL = 101 for ATmega164P/324P/644PV.
BODLEVEL 2:0 Fuses
BOT
Parameter
Minimum pulse width for asynchronous external interrupt
Reset, Brown-out and Internal Voltage Reference Characteristics
BODLEVEL Fuse Coding
Asynchronous External Interrupt Characteristics
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
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
RESET Pin Threshold Voltage
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
111
110
101
100
011
010
001
000
CC
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
Min V
(2)
1.7
2.5
4.1
BOT
V
V
V
C C
C C
C C
= 2.7V, T
= 2.7V, T
= 2.7V, T
Condition
Typ V
A
A
A
= 25°C
= 25°C
= 25°C
1.8
2.7
4.3
ATmega164P/324P/644P
BOD Disabled
BOT
Condition
(1)
Reserved
POT
0.2V
(falling)
Min
0.7
0.6
1.0
CC
Min
Max V
Typ
1.0
0.9
1.1
50
40
10
2.0
2.9
4.5
2
BOT
Typ
50
0.9V
Max
1.4
1.3
2.5
1.2
70
Max
CC
CC
Units
Units
drops to
V
mV
Units
µA
ns
ns
µs
V
V
V
V
ns
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