Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet
Product codes
AT91SAM9X25-EK
837
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
39.7.9.3 Local Loopback Mode
Local loopback mode connects the output of the transmitter directly to the input of the receiver, as shown in
.
The TXD and RXD pins are not used. The RXD pin has no effect on the receiver and the TXD pin is continuously driven
high, as in idle state.
high, as in idle state.
Figure 39-56.Local Loopback Mode Configuration
39.7.9.4 Remote Loopback Mode
Remote loopback mode directly connects the RXD pin to the TXD pin, as shown in
. The transmitter and the
receiver are disabled and have no effect. This mode allows bit-by-bit retransmission.
Figure 39-57.Remote Loopback Mode Configuration
Receiver
Transmitter
RXD
TXD
1
Receiver
Transmitter
RXD
TXD
1