Rainbow Electronics ATmega128RFA1 - Manual (Page 338)

338
8266A-MCU Wireless-12/09
ATmega128RFA1
22.4.3 SPDR – SPI Data Register
Bit 7 6 5 4 3 2 1 0
$2E ($4E) SPDR7:0 SPDR
Read/Write RW RW RW RW RW RW R R
Initial Value X X X X X X 0 0
The SPI Data Register is a read/write register used for data transfer between the
Register File and the SPI Shift Register. Writing to the register initiates data
transmission. Reading the register causes the Shift Register Receive buffer to be read.
• Bit 7:0 – SPDR7:0 - SPI Data Register