ATmega16 datasheet(313/315 Pages) ATMEL

313 / 315 page

ATmega16(L)

2466E–AVR–10/02

JTAG Interface and On-chip Debug System .................................. 216

Features............................................................................................................ 216

Overview........................................................................................................... 216

Test Access Port – TAP.................................................................................... 216

TAP Controller .................................................................................................. 218

Using the Boundary-scan Chain ....................................................................... 219

Using the On-chip Debug System .................................................................... 219

On-chip Debug Specific JTAG Instructions ...................................................... 220

On-chip Debug Related Register in I/O Memory .............................................. 221

Using the JTAG Programming Capabilities ...................................................... 221

Bibliography ...................................................................................................... 221

IEEE 1149.1 (JTAG) Boundary-scan ............................................... 222

Features............................................................................................................ 222

System Overview.............................................................................................. 222

Data Registers .................................................................................................. 222

Boundary-scan Specific JTAG Instructions ...................................................... 224

Boundary-scan Chain ....................................................................................... 226

ATmega16 Boundary-scan Order..................................................................... 236

Boundary-scan Description Language Files ..................................................... 240

Boot Loader Support – Read-While-Write Self-Programming ...... 241

Features............................................................................................................ 241

Application and Boot Loader Flash Sections .................................................... 241

Read-While-Write and no Read-While-Write Flash Sections ........................... 241

Boot Loader Lock Bits....................................................................................... 243

Entering the Boot Loader Program ................................................................... 244

Addressing the Flash during Self-Programming ............................................... 246

Self-Programming the Flash ............................................................................. 247

Memory Programming...................................................................... 254

Program And Data Memory Lock Bits .............................................................. 254

Fuse Bits........................................................................................................... 255

Signature Bytes ................................................................................................ 256

Calibration Byte ................................................................................................ 256

Parallel Programming Parameters, Pin Mapping, and Commands .................. 257

Parallel Programming ....................................................................................... 259

SPI Serial Downloading .................................................................................... 268

SPI Serial Programming Pin Mapping .............................................................. 268

Programming via the JTAG Interface ............................................................... 272

Electrical Characteristics................................................................. 285

Absolute Maximum Ratings*............................................................................. 285

DC Characteristics............................................................................................ 285

External Clock Drive Waveforms ...................................................................... 287

External Clock Drive ......................................................................................... 287

ATMEGA16 Datasheet(PDF) 313 Page - ATMEL Corporation

ATMEGA16 Datasheet(HTML) 313 Page - ATMEL Corporation

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