SAM7S256_14 Datasheet, PDF (392/775 Pages) ATMEL Corporation – ARM-based Flash MCU

1: USART operates in Synchronous Mode.
• PAR: Parity Type
PAR
Parity Type
0
0
0
Even parity
0
0
1
Odd parity
0
1
0
Parity forced to 0 (Space)
0
1
1
Parity forced to 1 (Mark)
1
0
x
No parity
1
1
x
Multidrop mode
• NBSTOP: Number of Stop Bits
NBSTOP
0
0
0
1
1
0
1
1
Asynchronous (SYNC = 0)
1 stop bit
1.5 stop bits
2 stop bits
Reserved
• CHMODE: Channel Mode
Synchronous (SYNC = 1)
1 stop bit
Reserved
2 stop bits
Reserved
CHMODE
0
0
0
1
1
0
1
1
Mode Description
Normal Mode
Automatic Echo. Receiver input is connected to the TXD pin.
Local Loopback. Transmitter output is connected to the Receiver Input..
Remote Loopback. RXD pin is internally connected to the TXD pin.
• MSBF: Bit Order
0: Least Significant Bit is sent/received first.
1: Most Significant Bit is sent/received first.
• MODE9: 9-bit Character Length
0: CHRL defines character length.
1: 9-bit character length.
• CLKO: Clock Output Select
0: The USART does not drive the SCK pin.
1: The USART drives the SCK pin if USCLKS does not select the external clock SCK.
• OVER: Oversampling Mode
0: 16x Oversampling.
1: 8x Oversampling.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
392