ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 2
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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
1. Pin Configurations
1.1
Figure 1-1.
Note:
8285BS–AVR–03/11
(USCK/SCL/PCINT4) PE4
(XCK/AIN0/PCINT2) PE2
Pinout - TQFP and QFN/MLF
The large center pad underneath the QFN/MLF packages is made of metal and internally connected to GND. It should be sol-
dered or glued to the board to ensure good mechanical stability. If the center pad is left unconnected, the package might loosen
from the board.
(DI/SDA/PCINT5) PE5
(OC0A/PCINT12) PB4
(OC1A/PCINT13) PB5
(OC1B/PCINT14) PB6
(MOSI/PCINT10) PB2
(MISO/PCINT11) PB3
(CLKO/PCINT7) PE7
(AIN1/PCINT3) PE3
(RXD/PCINT0) PE0
(TXD/PCINT1) PE1
(SCK/PCINT9) PB1
(DO/PCINT6) PE6
(SS/PCINT8) PB0
64A (TQFP)and 64M1 (QFN/MLF) Pinout
ATmega165A/ATmega165PA/ATmega325A/ATmega325PA/ATmega645A/ATmega645P
DNC
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
10
11
14
15
16
12
13
1
2
3
4
5
6
7
8
9
INDEX CORNER
39
38
35
34
33
48
47
46
45
44
43
42
41
40
37
36
PA3
PA4
PA5
PA6
PA7
PG2
PC7
PC5
PC4
PC3
PC2
PC1
PC0
PC6
PG1
PG0
2