ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 6
![IC MCU AVR 32K FLASH 64VQFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATMEGA325A-MU
Manufacturer Part Number
ATMEGA325A-MU
Description
IC MCU AVR 32K FLASH 64VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA325A-MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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2.2
Table 2-1.
2.3
2.3.1
2.3.2
2.3.3
2.3.4
6
Comparison Between
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P
Pin Descriptions
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
VCC
GND
Port A (PA7:PA0)
Port B (PB7:PB0)
Differences between: ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P
Device
ATmega165A
ATmega165PA
ATmega325A
ATmega325PA
ATmega3250A
ATmega3250PA
ATmega645A
ATmega645P
ATmega6450A
ATmega6450P
Digital supply voltage.
Ground.
Port A is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port A output buffers have symmetrical drive characteristics with both high sink and source
capability. As inputs, Port A pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port A pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port A also serves the functions of various special features of the
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on
nate Functions of Port B” on page
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port B output buffers have symmetrical drive characteristics with both high sink and source
capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port B has better driving capabilities than the other ports.
Port B also serves the functions of various special features of the
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on
nate Functions of Port B” on page
Flash
16Kbyte
16Kbyte
32Kbyte
32Kbyte
32Kbytes
32Kbyte
64Kbyte
64Kbyte
64Kbyte
64Kbyte
76.
76.
EEPROM
512Bytes
512Bytes
1Kbyte
1Kbyte
1Kbyte
1Kbyte
2Kbyte
2Kbyte
2Kbyte
2Kbyte
RAM
1Kbyte
1Kbyte
2Kbyte
2Kbyte
2Kbyte
2 byte
4Kbyte
4Kbyte
4Kbyte
4Kbyte
MHz
16
16
20
20
20
20
16
16
20
20
8285B–AVR–03/11
”Alter-
”Alter-
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