168
7679H–CAN–08/08
AT90CAN32/64/128
16. Serial Peripheral Interface – SPI
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
AT90CAN32/64/128 and peripheral devices or between several AVR devices. The
AT90CAN32/64/128 SPI includes the following features:
16.1 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
Figure 16-1. SPI Block Diagram
(1)
Note: 1. Refer to Figure 1-2 on page 5 or Figure 1-3 on page 6, and Table 9-6 on page 76 for SPI pin
placement.
SPI2X
SPI2X
DIVIDER
/2/4/8/16/32/64/128
clk
IO
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