ATmega640/1280/1281/2560/2561
29.6.15 ATmega1280/1281 Boot Loader Parameters
In Table 29-10 through Table 29-11, the parameters used in the description of the Self-Program-
ming are given.
Table 29-10. Boot Size Configuration, ATmega1280/1281(1)
512
words
0x0000 -
0xFDFF
0xFE00 -
0xFFFF
1
1
0
0
1
0
1
0
4
8
0xFDFF
0xFBFF
0xF7FF
0xEFFF
0xFE00
0xFC00
0xF800
0xF000
1024
words
0x0000 -
0xFBFF
0xFC00 -
0xFFFF
2048
words
0x0000 -
0xF7FF
0xF800 -
0xFFFF
16
32
4096
words
0x0000 -
0xEFFF
0xF000 -
0xFFFF
Note:
1. The different BOOTSZ Fuse configurations are shown in Figure 29-2.
Table 29-11. Read-While-Write Limit, ATmega1280/1281
Section(1)
Pages
Address
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
480
32
0x0000 - 0xEFFF
0xF000 - 0xFFFF
Note:
1. For details about these two section, see “NRWW – No Read-While-Write Section” on page
319 and “RWW – Read-While-Write Section” on page 319.
Table 29-12. Explanation of different variables used in Figure 29-3 and the mapping to the Z-
pointer, ATmega1280/1281
Corresponding
Variable
Z-value(2)
Description(1)
Most significant bit in the Program Counter. (The
Program Counter is 16 bits PC[15:0])
PCMSB
15
331
2549L–AVR–08/07
ATMEL [ ATMEL ]
