ATMEGA32(2008) 查看數據表（PDF） - Atmel Corporation

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ATMEGA32
(Rev.:2008)

8-bit Microcontroller with 32K Bytes In-System Programmable Flash

Atmel Corporation 

Prescaling and Conversion Timing 204

Changing Channel or Reference Selection 207

ADC Noise Canceler 208

ADC Conversion Result 213

JTAG Interface and On-chip Debug System 219

Features 219

Overview 219

Test Access Port – TAP 219

TAP Controller 221

Using the Boundary-scan Chain 222

Using the On-chip Debug System 222

On-chip Debug Specific JTAG Instructions 223

On-chip Debug Related Register in I/O Memory 224

Using the JTAG Programming Capabilities 224

Bibliography 224

IEEE 1149.1 (JTAG) Boundary-scan 225

Features 225

System Overview 225

Data Registers 225

Boundary-scan Specific JTAG Instructions 227

Boundary-scan Chain 229

ATmega32 Boundary-scan Order 239

Boundary-scan Description Language Files 243

Boot Loader Support – Read-While-Write Self-Programming 244

Features 244

Application and Boot Loader Flash Sections 244

Read-While-Write and no Read-While-Write Flash Sections 244

Boot Loader Lock Bits 246

Entering the Boot Loader Program 247

Addressing the Flash during Self-Programming 249

Self-Programming the Flash 250

Memory Programming 256

Program And Data Memory Lock Bits 256

Fuse Bits 257

Signature Bytes 258

Calibration Byte 258

Page Size 258

Parallel Programming Parameters, Pin Mapping, and Commands 259

Parallel Programming 261

SPI Serial Downloading 270

SPI Serial Programming Pin Mapping 270

Programming via the JTAG Interface 274

iv ATmega32(L)

2503N–AVR–06/08

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