Rainbow Electronics ATmega8515L - Manual (Page 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
Asynchronous Data Reception ......................................................................... 144
Multi-processor Communication Mode ............................................................. 147
Accessing UBRRH/UCSRC Registers.............................................................. 149
USART Register Description ............................................................................ 150
Examples of Baud Rate Setting ........................................................................ 155
Analog Comparator .......................................................................... 160
Boot Loader Support – Read-While-Write Self-Programming...... 162
Features............................................................................................................ 162
Application and Boot Loader Flash Sections .................................................... 162
Read-While-Write and No Read-While-Write Flash Sections ........................... 162
Boot Loader Lock Bits....................................................................................... 164
Entering the Boot Loader Program ................................................................... 165
Addressing the Flash During Self-Programming .............................................. 167
Self-Programming the Flash ............................................................................. 168
Memory Programming...................................................................... 175
Program and Data Memory Lock Bits............................................................... 175
Fuse Bits........................................................................................................... 176
Signature Bytes ................................................................................................ 177
Calibration Byte ................................................................................................ 177
Parallel Programming Parameters, Pin Mapping, and Commands .................. 178
Parallel Programming ....................................................................................... 180
Serial Downloading ........................................................................................... 189
Serial Programming Pin Mapping ..................................................................... 189
Electrical Characteristics................................................................. 194
External Clock Drive Waveforms ...................................................................... 196
External Clock Drive ......................................................................................... 196
SPI Timing Characteristics ............................................................................... 197
External Data Memory Timing .......................................................................... 199
ATmega8515 Typical Characteristics – Preliminary Data............. 204
Register Summary ............................................................................ 209
Instruction Set Summary ................................................................. 211
Ordering Information (1) ..................................................................... 214
Packaging Information ..................................................................... 215