Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Hoja De Datos
Los códigos de productos
AT32UC3A3-XPLD
588
32072H–AVR32–10/2012
AT32UC3A3
Figure 25-52. ASK Modulator Output
Figure 25-53. FSK Modulator Output
25.6.17
Test Modes
The internal loopback feature enables on-board diagnostics, and allows the USART to operate
in three different test modes, with reconfigured pin functionality, as shown below.
in three different test modes, with reconfigured pin functionality, as shown below.
25.6.17.1
Normal Mode
During normal operation, a receiver RXD pin is connected to a transmitter TXD pin.
Figure 25-54. Normal Mode Configuration
25.6.17.2
Automatic Echo Mode
Automatic echo mode allows bit-by-bit retransmission. When a bit is received on the RXD pin, it
is also sent to the TXD pin, as shown in
is also sent to the TXD pin, as shown in
. Transmitter configuration has no effect.
Manchester
encoded
data
default polarity
unipolar output
Txd
ASK Modulator
Output
Uptstream Frequency F0
NRZ stream
1
0
0
1
Manchester
encoded
data
default polarity
unipolar output
Txd
FSK Modulator
Output
Uptstream Frequencies
[F0, F0+offset]
NRZ stream
1
0
0
1
Receiver
Transmitter
RXD
TXD