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AVR Microcontrollers
AVR 32bit Microcontroller 512KB LQFP
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32117D–AVR-01/12
AT32UC3C
Figure 26-9.
Slave Mode Functional Block Diagram
Shift Register
SPCK
SPIENS
LSB
MSB
NSS
MOSI
SPI
Clock
TDRE
TDR
TD
RDRF
O
VRES
CSR0
CPOL
NCPHA
BITS
SPIEN
SPIDIS
MISO
UNDES
RDR
RD
4 - Character FIFO
0
1
RXFIFOEN
1
...
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