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ATmega16-16PU Arkusz danych(PDF) 16 Page - ATMEL Corporation

Numer części ATmega16-16PU
Szczegółowy opis  8-bit Microcontroller with 16K Bytes In-Syustem Programmable Flash
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Producent  ATMEL [ATMEL Corporation]
Strona internetowa  http://www.atmel.com
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ATmega16-16PU Arkusz danych(HTML) 16 Page - ATMEL Corporation

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2466S–AVR–05/09
ATmega16(L)
AVR ATmega16
Memories
This section describes the different memories in the ATmega16. The AVR architecture has two
main memory spaces, the Data Memory and the Program Memory space. In addition, the
ATmega16 features an EEPROM Memory for data storage. All three memory spaces are linear
and regular.
In-System
Reprogrammable
Flash Program
Memory
The ATmega16 contains 16K bytes On-chip In-System Reprogrammable Flash memory for pro-
gram storage. Since all AVR instructions are 16 or 32 bits wide, the Flash is organized as 8K 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 ATmega16 Pro-
gram Counter (PC) is 13 bits wide, thus addressing the 8K 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
246. “Memory Programming” on page 259 contains a detailed description on Flash data serial
downloading using the SPI pins or the JTAG interface.
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 Execution Tim-
ing” on page 13.
Figure 8. Program Memory Map
$0000
$1FFF
Application Flash Section
Boot Flash Section


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