ATmega328P datasheet(166/448 Pages) ATMEL

Part #	ATmega328P

Description	8-bit Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash

PDF	448 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

Logo

166 / 448 page

166

8161D–AVR–10/09

ATmega48PA/88PA/168PA/328P

18. SPI – Serial Peripheral Interface

18.1

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

18.2

Overview

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

ATmega48PA/88PA/168PA/328P and peripheral devices or between several AVR devices.

The USART can also be used in Master SPI mode, see “USART in SPI Mode” on page 204. The

PRSPI bit in ”Minimizing Power Consumption” on page 42 must be written to zero to enable SPI

module.

Figure 18-1. SPI Block Diagram

(1)

Note:

1. Refer to Figure 1-1 on page 2, and Table 13-3 on page 82 for SPI pin placement.

DIVIDER

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

ATmega328P Datasheet(PDF) 166 Page - ATMEL Corporation