Datasheet

148
ATmega325/3250/645/6450
2570K–AVR–04/07
When the SPI is enabled, the data direction of the MOSI, MISO, SCK, and SS pins is
overridden according to Table 64. For more details on automatic port overrides, refer to
“Alternate Port Functions” on page 64.
Note: 1. See “Alternate Functions of Port B” on page 66 for a detailed description of how to
define the direction of the user defined SPI pins.
Table 64. SPI Pin Overrides
(1)
Pin Direction, Master SPI Direction, Slave SPI
MOSI User Defined Input
MISO Input User Defined
SCK User Defined Input
SS User Defined Input