Datasheet

330
2549O–AVR–05/12
ATmega640/1280/1281/2560/2561
29.6.15 ATmega1280/1281 Boot Loader Parameters
In Table 29-10 and Table 29-11, the parameters used in the description of the Self-Programming
are given.
Note: 1. The different BOOTSZ Fuse configurations are shown in Figure 29-2 on page 320.
Note: 1. For details about these two section, see “NRWW – No Read-While-Write Section” on page
318 and “RWW – Read-While-Write Section” on page 318.
Table 29-10. Boot Size Configuration, ATmega1280/1281
(1)
BOOTSZ1 BOOTSZ0 Boot Size Pages Appli-cation Flash Section Boot Loader Flash Section End Application Section Boot Reset Address (Start Boot Loader Section)
11
512
words
4
0x0000 -
0xFDFF
0xFE00 -
0xFFFF
0xFDFF 0xFE00
10
1024
words
8
0x0000 -
0xFBFF
0xFC00 -
0xFFFF
0xFBFF 0xFC00
01
2048
words
16
0x0000 -
0xF7FF
0xF800 -
0xFFFF
0xF7FF 0xF800
00
4096
words
32
0x0000 -
0xEFFF
0xF000 -
0xFFFF
0xEFFF 0xF000
Table 29-11. Read-While-Write Limit, ATmega1280/1281
Section
(1)
Pages Address
Read-While-Write section (RWW) 480 0x0000 - 0xEFFF
No Read-While-Write section (NRWW) 32 0xF000 - 0xFFFF
Table 29-12. Explanation of different variables used in Figure 29-3 on page 322 and the map-
ping to the Z-pointer, ATmega1280/1281
Variable
Corresponding
Z-value
(2)
Description
(1)
PCMSB 15
Most significant bit in the Program Counter. (The
Program Counter is 16 bits PC[15:0])