Rainbow-electronics ATmega8515L Bedienungsanleitung PDF herunterladen (Seite 221)

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ATmega8515(L)

2512A–AVR–04/02

Frame Formats ................................................................................................. 136

USART Initialization.......................................................................................... 137

Data Transmission – The USART Transmitter ................................................. 138

Data Reception – The USART Receiver .......................................................... 140

AsynchronousData Reception ......................................................................... 144

Multi-processorCommunication Mode ............................................................. 147

Accessing UBRRH/UCSRC Registers.............................................................. 149

USART RegisterDescription ............................................................................ 150

Examples ofBaud Rate Setting........................................................................ 155

Analog Comparator .......................................................................... 160

Boot Loader Support – Read-While-Write Self-Programming...... 162

Features............................................................................................................ 162

Application andBoot LoaderFlash Sections .................................................... 162

Read-While-Write andNoRead-While-Write Flash Sections........................... 162

Boot LoaderLock Bits....................................................................................... 164

Entering the Boot Loader Program ................................................................... 165

Addressing the Flash During Self-Programming .............................................. 167

Self-Programming the Flash ............................................................................. 168

Memory Programming...................................................................... 175

Program andData Memory Lock Bits............................................................... 175

Fuse Bits........................................................................................................... 176

Signature Bytes ................................................................................................ 177

Calibration Byte ................................................................................................ 177

Parallel Programming Parameters, Pin Mapping, andCommands .................. 178

Parallel Programming ....................................................................................... 180

SerialDownloading........................................................................................... 189

Serial Programming Pin Mapping ..................................................................... 189

Electrical Characteristics................................................................. 194

ExternalClock Drive Waveforms ...................................................................... 196

ExternalClock Drive ......................................................................................... 196

SPI Timing Characteristics ............................................................................... 197

ExternalData Memory Timing .......................................................................... 199

ATmega8515 Typical Characteristics – Preliminary Data............. 204

Instruction Set Summary ................................................................. 211

Ordering Information

(1)

..................................................................... 214

Packaging Information ..................................................................... 215

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Rainbow-electronics ATmega8515L Bedienungsanleitung Seite 221