Rainbow Electronics AT90S8515 - Manual (Page 51)

51
AT90S8515
0841G–09/01
SPI Data Register – SPDR
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 7 6 5 4 3 2 1 0
$0F ($2F) MSB LSB SPDR
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value x x x x x x x x Undefined