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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega325P датащи(PDF) 154 Page - ATMEL Corporation |
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ATmega325P датащи(HTML) 154 Page - ATMEL Corporation |
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154 / 364 page  154 8023F–AVR–07/09 ATmega325P/3250P 17. SPI – Serial Peripheral Interface 17.1 Features • Full-duplex, Three-wire Synchronous Data Transfer • Master or Slave Operation • LSB First or MSB First Data Transfer • Seven Programmable Bit Rates • End of Transmission Interrupt Flag • Write Collision Flag Protection • Wake-up from Idle Mode • Double Speed (CK/2) Master SPI Mode 17.2 Overview The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the ATmega325P/3250P and peripheral devices or between several AVR devices. A simplified block diagram of the Serial Peripheral Interface is shown in Figure 17-1. The PRSPI bit in ”PRR – Power Reduction Register” on page 44 must be written to zero to enable the SPI module. Figure 17-1. SPI Block Diagram (1) Note: 1. Refer to Figure 1-1 on page 2, and Table 13-3 on page 71 for SPI pin placement. DIVIDER /2/4/8/16/32/64/128 |
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