ATXMEGA64A1-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA64A1-CU

8/16-bit XMEGA A1 Microcontroller

Atmel Corporation 

XMEGA A1

7.3 In-System Programmable Flash Program Memory

The XMEGA A1 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 (Bytes)

(384K/256K/192K/128K/64K)

2EFFF /

2F000 /

2FFFF /

30000 /

30FFF /

...

1EFFF / 16FFF / EFFF / 77FF

1F000 / 17000 /

1FFFF / 17FFF /

F000 / 7800 Application Table Section (Bytes)

FFFF / 7FFF

(8K/8K/8K/8K/4K)

20000 / 18000 / 10000 / 8000

20FFF / 18FFF / 10FFF / 87FF

Boot Section (Bytes)

(8K/8K/8K/8K/4K)

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

software.

7.4 Data Memory

The Data Memory consists of the I/O Memory, EEPROM and SRAM memories, all within one

linear address space, see Figure 7-2 on page 11. To simplify development, the memory map for

all devices in the family is identical and with empty, reserved memory space for smaller devices.

Figure 7-2. Data Memory Map (Hexadecimal address)

Byte Address ATxmega192A1

Byte Address ATxmega128A1

Byte Address

ATxmega64A1

0

I/O Registers

FFF

(4 KB)

0

I/O Registers

FFF

(4 KB)

0

I/O Registers

FFF

(4 KB)

1000

17FF

EEPROM

(2 KB)

1000

17FF

EEPROM

(2 KB)

1000

17FF

EEPROM

(2 KB)

RESERVED

RESERVED

RESERVED

11

8067L–AVR–08/10

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