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ATmega16-16PU Fiches technique(PDF) 16 Page - ATMEL Corporation |
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ATmega16-16PU Fiches technique(HTML) 16 Page - ATMEL Corporation |
16 / 357 page 16 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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Description similaire - ATmega16-16PU |
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