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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega328P датащи(PDF) 18 Page - ATMEL Corporation |
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ATmega328P датащи(HTML) 18 Page - ATMEL Corporation |
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18 / 345 page  18 7810A–AVR–11/09 ATmega328P [Preliminary] Figure 7-2. Data Memory Map 7.3.1 Data Memory Access Times This section describes the general access timing concepts for internal memory access. The internal data SRAM access is performed in two clk CPU cycles as described in Figure 7-3. Figure 7-3. On-chip Data SRAM Access Cycles 7.4 EEPROM Data Memory The ATmega328P contains 1K byte of data EEPROM memory. It is organized as a separate data space, in which single bytes can be read and written. The EEPROM has an endurance of at least 100,000 write/erase cycles. The access between the EEPROM and the CPU is described in the following, specifying the EEPROM Address Registers, the EEPROM Data Register, and the EEPROM Control Register. “Memory Programming” on page 286 contains a detailed description on EEPROM Programming in SPI or Parallel Programming mode. 32 Registers 64 I/O Registers Internal SRAM (2048 x 8) 0x0000 - 0x001F 0x0020 - 0x005F 0x08FF 0x0060 - 0x00FF Data Memory 160 Ext I/O Reg. 0x0100 clk WR RD Data Data Address Address valid T1 T2 T3 Compute Address CPU Memory Access Instruction Next Instruction |
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