at75c220 ATMEL Corporation, at75c220 Datasheet - Page 86
at75c220
Manufacturer Part Number
at75c220
Description
Smart Internet Appliance Processor Siap
Manufacturer
ATMEL Corporation
Datasheet
1.AT75C220.pdf
(144 pages)
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NBSTOP
0
0
1
1
NBSTOP: Number of Stop Bits
CHMODE: Channel Mode
MODE9: 9-bit Character Length
CKLO: Clock Output Select
The interpretation of the number of stop bits depends on SYNC.
0 = CHRL defines character length.
1 = 9-bit character length.
0 = The USART does not drive the SCK pin.
1 = The USART drives the SCK pin if USCLKS[1] is 0.
0
0
1
1
CHMODE
0
1
0
1
Asynchronous
0
1
0
1
1.5 stop bits
(SYNC = 0)
2 stop bits
Reserved
1 stop bit
AT75C220
Mode Description
Normal Mode
The USART channel operates as an Rx/Tx USART.
Automatic Echo
Receiver data input is connected to TXD pin.
Local Loopback
Transmitter output signal is connected to receiver input signal.
Remote Loopback
RXD pin is internally connected to TXD pin.
Synchronous
(SYNC = 1)
2 stop bits
Reserved
Reserved
1 stop bit
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