Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
626
42023E–SAM–07/2013
ATSAM4L8/L4/L2
SYNC = 1: USART operates in Synchronous mode.
If USART operates in SPI Mode, CPHA determines which edge of CLK causes data to change and which edge causes data to
be captured. CPHA is used with CPOL to produce the required clock/data relationship between master and slave devices.
CPHA = 0: Data is changed on the leading edge of CLK and captured on the following edge of CLK.
CPHA = 1: Data is captured on the leading edge of CLK and changed on the following edge of CLK.
• CHRL: Character Length.
• USCLKS: Clock Selection
Note:
1. The value of DIV is device dependent. Refer to the Module Configuration section at the end of this chapter.
• MODE
Table 24-21.
CHRL
Character Length
0
0
5 bits
0
1
6 bits
1
0
7 bits
1
1
8 bits
Table 24-22.
USCLKS
Selected Clock
0
0
CLK_USART
0
1
CLK_USART/DIV
1
0
Reserved
1
1
CLK
Table 24-23.
MODE
Mode of the USART
0
0
0
0
Normal
0
0
0
1
RS485
0
0
1
0
Hardware Handshaking
0
0
1
1
Modem
0
1
0
0
IS07816 Protocol: T = 0
0
1
1
0
IS07816 Protocol: T = 1
1
0
0
0
IrDA
1
0
1
0
LIN Master
1
0
1
1
LIN Slave
1
1
1
0
SPI Master
1
1
1
1
SPI Slave
Others
Reserved