128
ATmega8515(L)
2512K–AVR–01/10
Note:
define the direction of the user defined SPI pins.
The following code examples show how to initialize the SPI as a Master and how to per-
form a simple transmission. DDR_SPI in the examples must be replaced by the actual
Data Direction Register controlling the SPI pins. DD_MOSI, DD_MISO and DD_SCK
must be replaced by the actual data direction bits for these pins. For example, if MOSI is
placed on pin PB5, replace DD_MOSI with DDB5 and DDR_SPI with DDRB.
MISO
Input
User Defined
SCK
User Defined
Input
SS
User Defined
Input
Assembly Code Example
Table 55. SPI Pin Overrides
(1)
Pin
Direction, Master SPI
Direction, Slave SPI