Datasheet

673

SAM4S Series [DATASHEET]

11100F–ATARM–29-Jan-14

33.8.3 SPI Receive Data Register

Name: SPI_RDR

Address: 0x40008008

Access: Read-only

 RD: Receive Data

Data received by the SPI Interface is stored in this register in a right-justified format. Unused bits are read as zero.

 PCS: Peripheral Chip Select

In Master mode only, these bits indicate the value on the NPCS pins at the end of a transfer. Otherwise, these bits are read as

zero.

Note: When using variable peripheral select mode (PS = 1 in SPI_MR), it is mandatory to set the WDRBT field to 1 if the

PCS field must be processed in SPI_RDR .

31 30 29 28 27 26 25 24

––––––––

23 22 21 20 19 18 17 16

–––– PCS

15 14 13 12 11 10 9 8

76543210