ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 208

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

SPDR – SPI Data Register
208
ATmega640/1280/1281/2560/2561
The SPI Data Register is a read/write register used for data transfer between the Regis-
ter 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
0x2E (0x4E)
Read/Write
Initial Value
MSB
R/W
7
X
R/W
6
X
R/W
5
X
R/W
X
4
R/W
X
3
R/W
X
2
R/W
X
1
LSB
R/W
X
0
2549K–AVR–01/07
Undefined
SPDR