Rainbow Electronics ATmega32L - Manual (Page 311)

iv
ATmega32(L)
2503C–AVR–10/02
ADC Conversion Result.................................................................................... 211
JTAG Interface and On-chip Debug System .................................. 217
Features............................................................................................................ 217
Overview........................................................................................................... 217
Test Access Port – TAP.................................................................................... 217
TAP Controller .................................................................................................. 219
Using the Boundary-scan Chain ....................................................................... 220
Using the On-chip Debug System .................................................................... 220
On-chip Debug Specific JTAG Instructions ...................................................... 221
On-chip Debug Related Register in I/O Memory .............................................. 222
Using the JTAG Programming Capabilities ...................................................... 222
Bibliography ...................................................................................................... 222
IEEE 1149.1 (JTAG) Boundary-scan ............................................... 223
Features............................................................................................................ 223
System Overview.............................................................................................. 223
Data Registers .................................................................................................. 223
Boundary-scan Specific JTAG Instructions ...................................................... 225
Boundary-scan Chain ....................................................................................... 227
ATmega32 Boundary-scan Order..................................................................... 237
Boundary-scan Description Language Files ..................................................... 241
Boot Loader Support – Read-While-Write Self-Programming ...... 242
Features............................................................................................................ 242
Application and Boot Loader Flash Sections .................................................... 242
Read-While-Write and no Read-While-Write Flash Sections ........................... 242
Boot Loader Lock Bits....................................................................................... 244
Entering the Boot Loader Program ................................................................... 245
Addressing the Flash during Self-Programming ............................................... 247
Self-Programming the Flash ............................................................................. 248
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................................................................. 284
Absolute Maximum Ratings*............................................................................. 284
DC Characteristics ........................................................................................... 284