ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 175

• Manufacturer Part Number: ATmega88PA Automotive
• Manufacturer: Atmel Corporation

19.5.3
9223B–AVR–09/11
SPDR – SPI Data Register
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 reg-
ister causes the Shift Register Receive buffer to be read.
Bit
0x2E (0x4E)
Read/Write
Initial Value
Atmel ATmega48PA/88PA/168PA [Preliminary]
MSB
R/W
7
X
R/W
X
6
R/W
X
5
R/W
4
X
R/W
X
3
R/W
X
2
R/W
1
X
LSB
R/W
X
0
Undefined
SPDR
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