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AT91 Datasheet(PDF) 111 Page - ATMEL Corporation

Part # AT91
Description  ARM® Thumb® Microcontrollers
PDF  153 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT91 Datasheet(HTML) 111 Page - ATMEL Corporation

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111
AT91X40 Series
1354D–ATARM–08/02
•
PAR: Parity Type
• NBSTOP: Number of Stop Bits
The interpretation of the number of stop bits depends on SYNC.
•
CHMODE: Channel Mode
• MODE9: 9-bit Character Length (Code Label US_MODE9)
0 = CHRL defines character length.
1 = 9-bit character length.
• CKLO: Clock Output Select (Code Label US_CLKO)
0 = The USART does not drive the SCK pin.
1 = The USART drives the SCK pin if USCLKS[1] is 0.
PAR
Parity Type
Code Label
US_PAR
000
Even Parity
US_PAR_EVEN
001
Odd Parity
US_PAR_ODD
0
1
0
Parity forced to 0 (Space)
US_PAR_SPACE
0
1
1
Parity forced to 1 (Mark)
US_PAR_MARK
1
0
x
No parity
US_PAR_NO
1
1
x
Multi-drop mode
US_PAR_MULTIDROP
NBSTOP
Asynchronous (SYNC = 0)
Synchronous (SYNC = 1)
Code Label
US_NBSTOP
0
0
1 stop bit
1 stop bit
US_NBSTOP_1
0
1
1.5 stop bits
Reserved
US_NBSTOP_1_5
1
0
2 stop bits
2 stop bits
US_NBSTOP_2
1
1
Reserved
Reserved
–
CHMODE
Mode Description
Code Label
US_CHMODE
00
Normal Mode
The USART Channel operates as an Rx/Tx USART.
US_CHMODE_NORMAL
01
Automatic Echo
Receiver Data Input is connected to TXD pin.
US_CHMODE_AUTOMATIC_ECHO
10
Local Loopback
Transmitter Output Signal is connected to Receiver Input Signal.
US_CHMODE_LOCAL_LOOPBACK
11
Remote Loopback
RXD pin is internally connected to TXD pin.
US_CHMODE_REMODE_LOOPBACK



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