AT90PWM1_14 Datasheet, PDF (168/297 Pages) ATMEL Corporation – Advanced RISC Architecture

Table 51. SPI Pin Overrides⁽¹⁾
Pin
Direction, Master SPI
MISO
Input
SCK
User Defined
SS
User Defined
Direction, Slave SPI
User Defined
Input
Input
Note: 1. See “Alternate Functions of Port B” on page 65 for a detailed description of how to 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 perform 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. E.g. if MOSI is placed on pin PB2, replace DD_MOSI with DDB2 and DDR_SPI
with DDRB.
168 AT90PWM1
4378C–AVR–09/08