Datasheet

725
11011B–ATARM–21-Feb-12
SAM3N
35.8.4 USART in SPI Mode Timings
Timings are given with the following conditions.
VDDIO = 1.62V and 3V
SCK/MISO/MOSI Load = 30 pF
Figure 35-16. USART SPI Master Mode
• the MOSI line is driven by the output pin TXD
• the MISO line drives the input pin RXD
• the SCK line is driven by the output pin SCK
• the NSS line is driven by the output pin RTS
Figure 35-17. USART SPI Slave mode: (Mode 1 or 2)
• the MOSI line drives the input pin RXD
• the MISO line is driven by the output pin TXD
• the SCK line drives the input pin SCK
• the NSS line drives the input pin CTS
NSS
SPI
0
MSB
LSB
SPI
1
CPOL=1
CPOL=0
MISO
MOSI
SCK
SPI
5
SPI
2
SPI
3
SPI
4
SPI
4
SCK
MISO
MOSI
SPI
6
SPI
7
SPI
8
NSS
SPI
12
SPI
13