ATXMEGA32A4-MH 查看數據表（PDF） - Atmel Corporation

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ATXMEGA32A4-MH

8/16-bit AVR® XMEGA A4 Microcontroller

Atmel Corporation 

XMEGA A4

7.3 In-System Programmable Flash Program Memory

The XMEGA A4 devices contain On-chip In-System Programmable Flash memory for program

storage, see Figure 7-1 on page 11. Since all AVR instructions are 16- or 32-bits wide, each

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 Pro-

gram 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. Flash Program Memory (Hexadecimal address)

Word Address

0

Application Section

(128 KB/64 KB/32 KB/16 KB)

EFFF /

F000 /

FFFF /

10000 /

10FFF /

77FF /

7800 /

7FFF /

8000 /

87FF /

37FF / 17FF

3800 / 1800

3FFF / 1FFF

4000 / 2000

47FF / 27FF

...

Application Table Section

(4 KB/4 KB/4 KB/4 KB)

Boot Section

(8 KB/4 KB/4 KB/4 KB)

The Application Table Section and Boot Section can also be used for general application

software.

11

8069O–AVR–08/10

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