ATmega162 datasheet(322/324 Pages) ATMEL

322 / 324 page

2513K–AVR–07/09

ATmega162/V

Analog Comparator 195

JTAG Interface and On-chip Debug System 197

Features 197

Overview 197

Test Access Port – TAP 197

TAP Controller 200

Using the Boundary-scan Chain 200

Using the On-chip Debug system 201

On-chip debug specific JTAG instructions 202

On-chip Debug Related Register in I/O Memory 202

Using the JTAG Programming Capabilities 202

Bibliography 203

IEEE 1149.1 (JTAG) Boundary-scan 204

Features 204

System Overview 204

Data Registers 205

Boundary-scan Specific JTAG Instructions 206

Boundary-scan Chain 208

ATmega162 Boundary-scan Order 213

Boundary-scan Description Language Files 216

Boot Loader Support – Read-While-Write Self-programming 217

Features 217

Application and Boot Loader Flash Sections 217

Read-While-Write and No Read-While-Write Flash Sections 217

Boot Loader Lock Bits 219

Entering the Boot Loader Program 221

Addressing the Flash During Self-programming 223

Self-programming the Flash 224

Memory Programming 231

Program And Data Memory Lock Bits 231

Fuse Bits 232

Signature Bytes 234

Calibration Byte 234

Parallel Programming Parameters, Pin Mapping, and Commands 234

Parallel Programming 236

Serial Downloading 245

SPI Serial Programming Pin Mapping 245

Programming via the JTAG Interface 250

ATmega162 Datasheet(PDF) 322 Page - ATMEL Corporation