atxmega128d4-mh ATMEL Corporation, atxmega128d4-mh Datasheet - Page 11

• Manufacturer Part Number: atxmega128d4-mh
• Description: 8/16-bit Xmega D4 Microcontroller
• Manufacturer: ATMEL Corporation

7.3
8135F–AVR–02/10
In-System Programmable Flash Program Memory
The XMEGA D4 devices contain On-chip In-System Programmable Flash memory for program
storage, see
Flash address location is 16 bits.
The Program Flash memory space is divided into Application and Boot sections. Both sections
have dedicated Lock Bits for setting restrictions on write or read/write operations.
The Store Program Memory (SPM) instruction must reside in the Boot Section when used to
write to the Flash memory.
A third section inside the Application section is referred to as the Application Table section which
has separate Lock bits for storage of write or read/write protection. The Application Table sec-
tion can be used for storing non-volatile data or application software.
Figure 7-1.
The Application Table Section and Boot Section can also be used for general application
software.
10FFF
10000
EFFF
FFFF
F000
/
/
/
/
/
Figure 7-1 on page
Flash Program Memory (Hexadecimal address)
7FFF
77FF
87FF
7800
8000
Word Address
/
/
/
/
/
37FF
3FFF
47FF
3800
4000
11. Since all AVR instructions are 16- or 32-bits wide, each
/
/
/
/
/
1FFF
17FF
27FF
1800
2000
0
(128K/64 KB/32 KB/16 KB)
Application Table Section
(4 KB/4 KB/4 KB/4 KB)
(8 KB/4 KB/4 KB/4 KB)
Application Section
Boot Section
...
XMEGA D4
11