ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 678
![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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ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
26 Memory Programming ......................................................................... 283
27 Electrical Characteristics .................................................................... 317
28 ADC Characteristics ........................................................................... 330
29 Typical Characteristics ........................................................................ 332
25.5Boot Loader Lock Bits .........................................................................................270
25.6Entering the Boot Loader Program ......................................................................271
25.7Addressing the Flash During Self-Programming .................................................272
25.8Self-Programming the Flash ................................................................................273
25.9Register Description ............................................................................................281
26.1Program And Data Memory Lock Bits .................................................................283
26.2Fuse Bits .............................................................................................................284
26.3Signature Bytes ...................................................................................................286
26.4Calibration Byte ...................................................................................................286
26.5Page Size ............................................................................................................286
26.6Parallel Programming Parameters, Pin Mapping, and Commands .....................286
26.7Parallel Programming ..........................................................................................289
26.8Serial Downloading .............................................................................................298
26.9Programming via the JTAG Interface ..................................................................304
27.1Absolute Maximum Ratings* ...............................................................................317
27.2DC Characteristics ..............................................................................................317
27.3Speed Grades .....................................................................................................324
27.4Clock Characteristics ...........................................................................................325
27.5System and Reset Characteristics ......................................................................326
27.6Power-on Reset ...................................................................................................326
27.7Brown-out Detection ............................................................................................327
27.8External Interrupts Characteristics ......................................................................327
27.9SPI Timing Characteristics ..................................................................................328
29.1ATmega165A ......................................................................................................332
29.2ATmega165PA ....................................................................................................365
29.3ATmega325A ......................................................................................................397
29.4ATmega325PA ....................................................................................................428
29.5ATmega3250A ....................................................................................................459
29.6ATmega3250PA ..................................................................................................490
29.7ATmega645A ......................................................................................................521
29.8ATmega645P ......................................................................................................553
8285B–AVR–03/11
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