ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

Operation .......................................................................................................... 231

Starting a Conversion ....................................................................................... 232

Prescaling and Conversion Timing ................................................................... 233

Changing Channel or Reference Selection ...................................................... 236

ADC Noise Canceler......................................................................................... 238

ADC Conversion Result.................................................................................... 242

JTAG Interface and On-chip Debug System ................................. 248

Features............................................................................................................ 248

Overview........................................................................................................... 248

Test Access Port – TAP.................................................................................... 248

TAP Controller .................................................................................................. 250

Using the Boundary -scan Chain ...................................................................... 251

Using the On-chip Debug system ..................................................................... 251

On-chip Debug Specific JTAG Instructions ...................................................... 252

On-chip Debug Related Register in I/O Memory .............................................. 253

Using the JTAG Programming Capabilities ...................................................... 253

Bibliography ...................................................................................................... 253

IEEE 1149.1 (JTAG) Boundary-scan .............................................. 254

Features............................................................................................................ 254

System Overview.............................................................................................. 254

Data Registers .................................................................................................. 254

Boundary-scan Specific JTAG Instructions ...................................................... 256

Boundary-scan Related Register in I/O Memory .............................................. 258

Boundary-scan Chain ....................................................................................... 258

ATmega64 Boundary-scan Order..................................................................... 270

Boundary-scan Description Language Files ..................................................... 276

Boot Loader Support – Read-While-Write Self-programming ..... 277

Features............................................................................................................ 277

Application and Boot Loader Flash Sections .................................................... 277

Read-While-Write and No Read-While-Write Flash Sections........................... 277

Boot Loader Lock Bits....................................................................................... 279

Entering the Boot Loader Program ................................................................... 281

Addressing the Flash During Self-programming............................................... 283

Self-programming the Flash ............................................................................. 284

Memory Programming..................................................................... 290

Program and Data Memory Lock Bits............................................................... 290

Fuse Bits........................................................................................................... 291

Signature Bytes ................................................................................................ 293

Calibration Byte ................................................................................................ 293

Parallel Programming Parameters, Pin Mapping, and Commands .................. 293

Parallel Programming ....................................................................................... 297

Serial Downloading........................................................................................... 306

iv ATmega64(L)

2490G–AVR–03/04

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