Datasheet

210
7593L–AVR–09/12
AT90USB64/128
• The SPI double speed mode (SPI2X) bit is not included. However, the same effect is
achieved by setting UBRRn accordingly
• Interrupt timing is not compatible
• Pin control differs due to the master only operation of the USART in MSPIM mode
A comparison of the USART in MSPIM mode and the SPI pins is shown in Table 20-4 on page
210.
Table 20-4. Comparison of USART in MSPIM mode and SPI pins.
USART_MSPIM SPI Comment
TxDn MOSI Master Out only
RxDn MISO Master In only
XCKn SCK (Functionally identical)
(N/A) SS
Not supported by USART in MSPIM