ATmega325 Atmel Corporation, ATmega325 Datasheet - Page 358

• Manufacturer Part Number: ATmega325
• 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

2570N–AVR–05/11
19 SPI – Serial Peripheral Interface ......................................................... 148
20 USART0 ................................................................................................. 157
21 USI – Universal Serial Interface .......................................................... 185
22 Analog Comparator ............................................................................. 197
23 Analog to Digital Converter ................................................................ 201
18.7
18.8
18.9
18.10
18.11
19.1
19.2
19.3
19.4
19.5
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
20.10
20.11
21.1
21.2
21.3
21.4
22.1
22.2
23.1
23.2
Modes of Operation .......................................................................................135
Timer/Counter Timing Diagrams ...................................................................139
Asynchronous Operation of Timer/Counter2 .................................................141
Timer/Counter Prescaler ...............................................................................142
Register Description ......................................................................................143
Features ........................................................................................................148
Overview ........................................................................................................148
SS Pin Functionality ......................................................................................152
Data Modes ...................................................................................................153
Register Description ......................................................................................154
Features ........................................................................................................157
Overview ........................................................................................................157
Clock Generation ...........................................................................................159
Frame Formats ..............................................................................................162
USART Initialization .......................................................................................163
Data Transmission – The USART Transmitter ..............................................165
Data Reception – The USART Receiver .......................................................167
Asynchronous Data Reception ......................................................................171
Multi-processor Communication Mode ..........................................................174
Examples of Baud Rate Setting .....................................................................176
Register Description ......................................................................................179
Overview ........................................................................................................185
Functional Descriptions .................................................................................186
Alternative USI Usage ...................................................................................192
Register Descriptions ....................................................................................192
Analog Comparator Multiplexed Input ...........................................................198
Register Description ......................................................................................198
Features ........................................................................................................201
Operation .......................................................................................................202
ATmega325/3250/645/6450
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