Datasheet

374
7674F–AVR–09/09
ATmega164P/324P/644P
23.7 Boundary-scan Description Language Files ..................................................277
23.8 Register Description ......................................................................................278
24 Boot Loader Support – Read-While-Write Self-Programming ......... 279
24.1 Features ........................................................................................................279
24.2 Overview ........................................................................................................279
24.3 Application and Boot Loader Flash Sections .................................................279
24.4 Read-While-Write and No Read-While-Write Flash Sections ........................280
24.5 Boot Loader Lock Bits ...................................................................................282
24.6 Entering the Boot Loader Program ................................................................283
24.7 Addressing the Flash During Self-Programming ...........................................284
24.8 Self-Programming the Flash ..........................................................................285
24.9 Register Description ......................................................................................294
25 Memory Programming ......................................................................... 296
25.1 Program And Data Memory Lock Bits ...........................................................296
25.2 Fuse Bits ........................................................................................................297
25.3 Signature Bytes .............................................................................................299
25.4 Calibration Byte .............................................................................................299
25.5 Page Size ......................................................................................................299
25.6 Parallel Programming Parameters, Pin Mapping, and Commands ...............300
25.7 Parallel Programming ....................................................................................302
25.8 Serial Downloading ........................................................................................311
25.9 Serial Programming Instruction set ...............................................................313
25.10 Programming via the JTAG Interface ............................................................315
26 Electrical Characteristics .................................................................... 328
26.1 DC Characteristics .........................................................................................329
26.2 Speed Grades ...............................................................................................330
26.3 Clock Characteristics .....................................................................................331
26.4 System and Reset Characteristics ................................................................332
26.5 SPI Timing Characteristics ............................................................................333
26.6 2-wire Serial Interface Characteristics ...........................................................334
26.7 ADC Characteristics ......................................................................................336
27 ATmega644P Typical Characteristics ................................................ 338
27.1 Power-down Supply Current ..........................................................................343
27.2 Power-save Supply Current ...........................................................................344
27.3 Pin Pull-up .....................................................................................................345