Program/Code Memory ...................................................................... 32
Flash Memory Architecture ................................................................................ 32
Overview of FM0 Operations.............................................................................. 34
Registers ............................................................................................................ 40
Operation Cross Memory Access ..................................................... 42
Sharing Instructions........................................................................... 43
In-System Programming (ISP) ........................................................... 45
Flash Programming and Erasure ....................................................................... 45
Boot Process...................................................................................................... 46
Application-Programming-Interface.................................................................... 46
XROW Bytes ...................................................................................................... 47
Hardware Conditions.......................................................................................... 47
Hardware Security Byte...................................................................................... 48
Serial I/O Port ...................................................................................... 49
Framing Error Detection .................................................................................... 49
Automatic Address Recognition ......................................................................... 50
Given Address.................................................................................................... 50
Broadcast Address ............................................................................................. 51
Registers ............................................................................................................. 52
Timers/Counters ................................................................................. 55
Timer/Counter Operations.................................................................................. 55
Timer 0 ............................................................................................................... 55
Timer 1 ............................................................................................................... 57
Interrupt.............................................................................................................. 58
Registers ............................................................................................................ 59
Timer 2 ................................................................................................. 62
Auto-Reload Mode ............................................................................................. 62
Programmable Clock-Output.............................................................................. 63
Registers ............................................................................................................ 64
Watchdog Timer .................................................................................. 67
Watchdog Programming...................................................................................... 68
Watchdog Timer During Power-down Mode and Idle ...................... 69
Register .............................................................................................................. 69
Programmable Counter Array (PCA) ................................................. 71
ii
ATMEL [ ATMEL ]
