AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 173

• Manufacturer Part Number: AT90USB1286-16MU
• Description: Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
• Manufacturer: ATMEL [ATMEL Corporation]

17. Serial Peripheral Interface – SPI
7593A–AVR–02/06
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
A T 9 0 U S B 6 4 / 1 2 8 a n d p e r i p h e r a l d e v i c e s o r b e t w e e n s e v e r a l A V R d e v i c e s . T h e
AT90USB64/128 SPI includes the following features:
•
•
•
•
•
•
•
•
USART can also be used in Master SPI mode, see “USART in SPI Mode” on page 207.
The Power Reduction SPI bit, PRSPI, in
page 50 must be written to zero to enable SPI module.
Figure 17-1. SPI Block Diagram
Note:
The interconnection between Master and Slave CPUs with SPI is shown in
tem consists of two shift Registers, and a Master clock generator. The SPI Master initiates the
communication cycle when pulling low the Slave Select SS pin of the desired Slave. Master and
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
1. Refer to
/2/4/8/16/32/64/128
DIVIDER
Figure 1-1 on page
(1)
3, and
“Power Reduction Register 0 - PRR0” on page 55
Table 10-6 on page 81
for SPI pin placement.
AT90USB64/128
Figure
17-2. The sys-
173
on