ATMEGA8515_10 datasheet(16/257 Pages) ATMEL

Part #	ATMEGA8515

Description	8-bit Microcontroller with 8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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ATmega8515(L)

2512K–AVR–01/10

AVR ATmega8515

Memories

This section describes the different memories in the ATmega8515. The AVR architec-

ture has two main memory spaces, the Data Memory and the Program memory space.

In addition, the ATmega8515 features an EEPROM Memory for data storage. All three

memory spaces are linear and regular.

In-System

Reprogrammable Flash

Program memory

The ATmega8515 contains 8K bytes On-chip In-System Reprogrammable Flash mem-

ory for program storage. Since all AVR instructions are 16 or 32 bits wide, the Flash is

organized as 4K x 16. For software security, the Flash Program memory space is

divided into two sections, Boot Program section and Application Program section.

The Flash memory has an endurance of at least 10,000 write/erase cycles. The

ATmega8515 Program Counter (PC) is 12 bits wide, thus addressing the 4K Program

memory locations. The operation of Boot Program section and associated Boot Lock

bits for software protection are described in detail in “Boot Loader Support – Read-

While-Write Self-Programming” on page 166. “Memory Programming” on page 179 con-

tains a detailed description on Flash data serial downloading using the SPI pins.

Constant tables can be allocated within the entire Program memory address space, see

the LPM – Load Program memory instruction description.

Timing diagrams for instruction fetch and execution are presented in “Instruction Execu-

tion Timing” on page 13.

Figure 8. Program memory Map

$000

$FFF

Application Flash Section

Boot Flash Section

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