ATMEGA1284P-AUR Atmel, ATMEGA1284P-AUR Datasheet - Page 576

• Manufacturer Part Number: ATMEGA1284P-AUR
• Description: MCU AVR 128KB FLASH 20MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA1284P-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K 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: 44-TQFP, 44-VQFP
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8272A–AVR–01/10
17 SPI – Serial Peripheral Interface ......................................................... 162
18 USART ................................................................................................... 172
19 USART in SPI Mode ............................................................................. 199
20 2-wire Serial Interface .......................................................................... 208
164A/164PA/324A/324PA/644A/644PA/1284/1284P
16.7Modes of Operation .............................................................................................145
16.8Timer/Counter Timing Diagrams .........................................................................149
16.9Asynchronous Operation of Timer/Counter2 .......................................................151
16.10Timer/Counter Prescaler ...................................................................................153
16.11Register Description ..........................................................................................154
17.1Features ..............................................................................................................162
17.2Overview .............................................................................................................162
17.3SS Pin Functionality ............................................................................................167
17.4Data Modes .........................................................................................................167
17.5Register Description ............................................................................................169
18.1Features ..............................................................................................................172
18.2USART1 and USART0 ........................................................................................172
18.3Overview .............................................................................................................172
18.4Clock Generation .................................................................................................173
18.5Frame Formats ....................................................................................................176
18.6USART Initialization ............................................................................................177
18.7Data Transmission – The USART Transmitter ....................................................178
18.8Data Reception – The USART Receiver .............................................................181
18.9Asynchronous Data Reception ............................................................................185
18.10Multi-processor Communication Mode ..............................................................188
18.11Register Description ..........................................................................................190
18.12Examples of Baud Rate Setting ........................................................................195
19.1Features ..............................................................................................................199
19.2Overview .............................................................................................................199
19.3Clock Generation .................................................................................................199
19.4SPI Data Modes and Timing ...............................................................................200
19.5Frame Formats ....................................................................................................200
19.6Data Transfer ......................................................................................................202
19.7AVR USART MSPIM vs. AVR SPI ......................................................................204
19.8Register Description ............................................................................................205
20.1Features ..............................................................................................................208
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