ATMEGA164P-20AQ Atmel, ATMEGA164P-20AQ Datasheet - Page 434

• Manufacturer Part Number: ATMEGA164P-20AQ
• Description: MCU AVR 16K FLASH 20MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA164P-20AQ

• 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: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 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-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8011O–AVR–07/10
15 SPI – Serial Peripheral Interface ......................................................... 161
16 USART ................................................................................................... 171
17 USART in SPI Mode ............................................................................. 198
14.5 Output Compare Unit .........................................................................................141
14.6 Compare Match Output Unit ...............................................................................143
14.7 Modes of Operation ............................................................................................144
14.8 Timer/Counter Timing Diagrams ........................................................................148
14.9 Asynchronous Operation of Timer/Counter2 ......................................................150
14.10 Timer/Counter Prescaler ..................................................................................152
14.11 Register Description .........................................................................................152
15.1 Features .............................................................................................................161
15.2 Overview ............................................................................................................161
15.3 SS Pin Functionality ...........................................................................................166
15.4 Data Modes ........................................................................................................166
15.5 Register Description ...........................................................................................168
16.1 Features .............................................................................................................171
16.2 USART1 and USART0 .......................................................................................171
16.3 Overview ............................................................................................................171
16.4 Clock Generation ................................................................................................172
16.5 Frame Formats ...................................................................................................175
16.6 USART Initialization ...........................................................................................176
16.7 Data Transmission – The USART Transmitter ...................................................177
16.8 Data Reception – The USART Receiver ............................................................180
16.9 Asynchronous Data Reception ...........................................................................184
16.10 Multi-processor Communication Mode .............................................................187
16.11 Register Description .........................................................................................189
16.12 Examples of Baud Rate Setting .......................................................................194
17.1 Features .............................................................................................................198
17.2 Overview ............................................................................................................198
17.3 Clock Generation ................................................................................................198
17.4 SPI Data Modes and Timing ..............................................................................199
17.5 Frame Formats ...................................................................................................199
17.6 Data Transfer .....................................................................................................201
17.7 AVR USART MSPIM vs. AVR SPI .....................................................................203
17.8 Register Description ...........................................................................................204
ATmega164P/324P/644P
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