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ATMEGA48 Datasheet(PDF) 161 Page - ATMEL Corporation

Part # ATMEGA48
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  374 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA48 Datasheet(HTML) 161 Page - ATMEL Corporation

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2545J–AVR–12/06
ATmega48/88/168
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
ATmega48/88/168 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 199. The
PRSPI bit in ”Minimizing Power Consumption” on page 41 must be written to zero to enable SPI
module.



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