Table of Contents
Features ................................................................................................. 1
Description ............................................................................................ 2
Typical Applications ............................................................................. 2
Block Diagram ....................................................................................... 3
Pin Description ...................................................................................... 4
Pinouts ................................................................................................................. 4
Signals................................................................................................................... 5
Internal Pin Structure.......................................................................................... 11
Clock Controller .................................................................................. 12
Oscillator ............................................................................................................ 12
X2 Feature.......................................................................................................... 12
PLL..................................................................................................................... 13
Registers ............................................................................................................. 15
Program/Code Memory ...................................................................... 17
ROM Memory Architecture................................................................................. 17
Flash Memory Architecture ................................................................................ 18
Hardware Security System.................................................................................. 19
Boot Memory Execution ..................................................................................... 19
Preventing Flash Corruption............................................................................... 20
Registers ............................................................................................................. 21
Hardware Bytes................................................................................................... 22
Data Memory ....................................................................................... 23
Internal Space .................................................................................................... 23
External Space.................................................................................................... 25
Dual Data Pointer............................................................................................... 27
Registers ............................................................................................................ 28
Special Function Registers ................................................................ 30
Interrupt System ................................................................................. 36
Interrupt System Priorities.................................................................................. 36
External Interrupts.............................................................................................. 39
Registers ............................................................................................................. 40
231
ATMEL [ ATMEL ]
