Rainbow-electronics ATmega64M1 Manuale Utente Scaricare il pdf (Pagina 154)

100

101

154

8209A–AVR–08/09

ATmega16M1/32M1/64M1

19. SPI – Serial Peripheral Interface

19.1 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

19.2 Overview

The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the

ATmega16M1/32M1/64M1 and peripheral devices or between several AVR devices.

Figure 19-1. SPI Block Diagram

(1)

Note: 1. Refer to Figure 1-1 on page 2, and Table 14-3 on page 72 for SPI pin placement.

SPI2X

DIVIDER

/2/4/8/16/32/64/128

clk

MISO

MOSI

SCK

SS_A

SPIPS

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 342 343

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