ATmega16 datasheet(352/357 Pages) ATMEL

352 / 357 page

iii

2466S–AVR–05/09

ATmega16(L)

8-bit Timer/Counter2 with PWM and Asynchronous Operation 117

Overview 117

Timer/Counter Clock Sources 118

Counter Unit 118

Output Compare Unit 119

Compare Match Output Unit 121

Modes of Operation 122

Timer/Counter Timing Diagrams 126

8-bit Timer/Counter Register Description 128

Asynchronous Operation of the Timer/Counter 131

Timer/Counter Prescaler 134

Serial Peripheral Interface – SPI 135

SS Pin Functionality 140

Data Modes 143

USART 144

Overview 144

Clock Generation 145

Frame Formats 148

USART Initialization 149

Data Reception – The USART Receiver 154

Asynchronous Data Reception 157

Multi-processor Communication Mode 161

Accessing UBRRH/ UCSRC Registers 162

USART Register Description 163

Examples of Baud Rate Setting 168

Two-wire Serial Interface 172

Features 172

Two-wire Serial Interface Bus Definition 172

Data Transfer and Frame Format 173

Multi-master Bus Systems, Arbitration and Synchronization 176

Overview of the TWI Module 178

TWI Register Description 180

Using the TWI 183

Transmission Modes 186

Multi-master Systems and Arbitration 199

Analog Comparator 201

Analog Comparator Multiplexed Input 203

Analog to Digital Converter 204

Features 204

Operation 205

Starting a Conversion 206

ATmega16 Datasheet(PDF) 352 Page - ATMEL Corporation

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