AT91SAM7A2_04 Datasheet, PDF (204/369 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

PRELIMINARY
SPI in Master Mode
Figure 64. SPI in Master Mode
SPI _MR ( DIV32 )
CORECLK
0
÷32
1
SPCK Clock Generator
SPI _CSRx[15:0]
SPI _CR (SPIDIS )
SPI _CR (SPIEN )
S
Q
R
MISO
MOSI
PCS
SPI _RDR (RD)
LSB
MSB
Serializer
PCS
SPI _TDR (TD)
SPI _MR (PS)
PCS
Decoder
PCSDEC
1
SPI _MR (PCS)
0
SPI _MR ( MSTR )
NPCS0 /NSS
SPCK
SPI _SR
SPIENS
OVRE
RDRF
TDRF
MODF
SPI _IER
SPI _IDR
SPI _IMR
NPCS3
NPCS2
NPCS1
NPCS0/NSS
SPI _INT
204 _AT91SAM7A2
6021A–ATARM–07/04