atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 427

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

19 USART ................................................................................................... 205
20 USART in SPI Mode ............................................................................. 233
21 2-wire Serial Interface .......................................................................... 242
22 USB controller ...................................................................................... 272
7766A–AVR–03/08
18.2 Data Modes ........................................................................................................203
19.1 Overview .............................................................................................................205
19.2 Clock Generation ................................................................................................206
19.3 Frame Formats ...................................................................................................209
19.4 USART Initialization ............................................................................................211
19.5 Data Transmission – The USART Transmitter ...................................................212
19.6 Data Reception – The USART Receiver ............................................................214
19.7 Asynchronous Data Reception ...........................................................................218
19.8 Multi-processor Communication Mode ...............................................................221
19.9 Hardware Flow Control .......................................................................................222
19.10 USART Register Description ............................................................................224
19.11 Examples of Baud Rate Setting ........................................................................228
20.1 Overview .............................................................................................................233
20.2 Clock Generation ................................................................................................233
20.3 SPI Data Modes and Timing ...............................................................................234
20.4 Frame Formats ...................................................................................................234
20.5 Data Transfer ......................................................................................................236
20.6 USART MSPIM Register Description .................................................................238
20.7 AVR USART MSPIM vs. AVR SPI .....................................................................240
21.1 Features .............................................................................................................242
21.2 2-wire Serial Interface Bus Definition .................................................................242
21.3 Data Transfer and Frame Format .......................................................................243
21.4 Multi-master Bus Systems, Arbitration and Synchronization ..............................246
21.5 Overview of the TWI Module ..............................................................................247
21.6 TWI Register Description ....................................................................................250
21.7 Using the TWI .....................................................................................................253
21.8 Transmission Modes ..........................................................................................257
21.9 Multi-master Systems and Arbitration .................................................................270
22.1 Features .............................................................................................................272
22.2 Block Diagram ....................................................................................................272
22.3 Typical Application Implementation ....................................................................273
ATmega32U4
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