ATmega325 Atmel Corporation, ATmega325 Datasheet - Page 301
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ATmega325
Manufacturer Part Number
ATmega325
Description
Manufacturer
Atmel Corporation
Specifications of ATmega325
Flash (kbytes)
32 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
54
Ext Interrupts
17
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
2
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATmega325-16AI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATmega325-16AU
Manufacturer:
ATMEL
Quantity:
231
Part Number:
ATmega325-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega3250-16AI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega3250-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega3250P-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
28.5
Table 28-4.
Notes:
Table 28-5.
Note:
2570N–AVR–05/11
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)
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 10 for Atmel ATmega325/3250/645/6450 and BODLEVEL = 01 for Atmel 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)
1.7
2.5
4.1
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
ATmega325/3250/645/6450
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
1.0
0.9
1.1
50
40
15
2.0
2.9
4.5
2
BOT
0.85V
Max
1.4
1.3
4.5
1.2
70
CC
CC
Units
drops to
V
Units
V/ms
mV
µA
ns
µs
µs
V
V
V
V
301