ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 677
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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8285B–AVR–03/11
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
22 ADC - Analog to Digital Converter ..................................................... 214
23 JTAG Interface and On-chip Debug System ..................................... 232
24 IEEE 1149.1 (JTAG) Boundary-scan ................................................... 239
25 Boot Loader Support – Read-While-Write Self-Programming ......... 266
22.1Features ..............................................................................................................214
22.2Overview .............................................................................................................214
22.3Operation .............................................................................................................215
22.4Starting a Conversion ..........................................................................................216
22.5Prescaling and Conversion Timing ......................................................................217
22.6Changing Channel or Reference Selection .........................................................219
22.7ADC Noise Canceler ...........................................................................................220
22.8ADC Conversion Result ......................................................................................225
22.9Register Description ............................................................................................227
23.1Features ..............................................................................................................232
23.2Overview .............................................................................................................232
23.3TAP – Test Access Port ......................................................................................233
23.4TAP Controller .....................................................................................................235
23.5Using the Boundary-scan Chain ..........................................................................236
23.6Using the On-chip Debug System .......................................................................236
23.7On-chip Debug Specific JTAG Instructions .........................................................237
23.8Using the JTAG Programming Capabilities .........................................................237
23.9On-chip Debug Related Register in I/O Memory .................................................238
23.10Bibliography .......................................................................................................238
24.1Features ..............................................................................................................239
24.2System Overview ................................................................................................239
24.3Data Registers .....................................................................................................240
24.4Boundary-scan Specific JTAG Instructions .........................................................241
24.5Boundary-scan Chain ..........................................................................................242
24.6Boundary-scan Order ..........................................................................................251
24.7Boundary-scan Description Language Files ........................................................264
24.8Boundary-scan Related Register in I/O Memory .................................................265
25.1Features ..............................................................................................................266
25.2Overview .............................................................................................................266
25.3Application and Boot Loader Flash Sections .......................................................266
25.4Read-While-Write and No Read-While-Write Flash Sections ..............................267
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