Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1178
44.12.7 USART in SPI Mode Timings
Timings are given in the following domain:
1.8V domain: VDDIO from 1.65V to 1.95V, maximum external capacitor = 20 pF
3.3V domain: VDDIO from 2.85V to 3.6V, maximum external capacitor = 40 pF
Figure 44-33. USART SPI Master Mode
Figure 44-34. USART SPI Slave Mode: (Mode 1 or 2)
NSS
SPI
0
MSB
LSB
SPI
1
CPOL=1
CPOL=0
MISO
MOSI
SCK
SPI
5
SPI
2
SPI
3
SPI
4
SPI
4
• 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
• 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
SCK
MISO
MOSI
SPI
6
SPI
7
SPI
8
NSS
SPI
12
SPI
13
• 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
• 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