3.2.3 Boot Loader Parameters for ATmega645A/P/6450A/P

A clarification has been made to list the Boot loader parameters and the Read-While-Write limits for ATmega645A/P/6450A/P.

Table 3-5. Boot Size Configuration (ATmega645A/P/6450A/P)⁽¹⁾
BOOTSZ1	BOOTSZ0	Boot Size	Pages	Application Flash  Section	Boot Loader Flash  Section	End Application  Section	Boot Reset Address (Start Boot  Loader Section)
1	1	512 words	4	0x0000 - 0x7DFF	0x7E00 - 0x7FFF	0x7DFF	0x7E00
1	0	1024 words	8	0x0000 - 0x7BFF	0x7C00 - 0x7FFF	0x7BFF	0x7C00
0	1	2048 words	16	0x0000 - 0x77FF	0x7800 - 0x7FFF	0x77FF	0x7800
0	0	4096 words	32	0x0000 - 0x6FFF	0x7000 - 0x7FFF	0x6FFF	0x7000

Note: The Figure Memory sections shows the different BOOTSZ Fuse configurations.

Table 3-6. Read-While-Write Limit (ATmega645A/P/6450A/P)⁽¹⁾
Section	Pages	Address
Read-While-Write (RWW) section	224	0x0000 - 0x6FFF
No Read-While-Write (NRWW) section	32	0x7000 - 0x7FFF

Note: For details about these two sections, see NRWW – No Read-While-Write Section and RWW – Read-While-Write Section.