Atmel AVR AT90S8515-4 Dokumentacja Pobierz pdf (Strona 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 76543210

$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

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 111 112

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Atmel AVR AT90S8515-4 Dokumentacja Strona 51