at32uc3b0512-z2ues ATMEL Corporation, at32uc3b0512-z2ues Datasheet - Page 317

• Manufacturer Part Number: at32uc3b0512-z2ues
• Description: 32-bit Avr Microcontroller
• Manufacturer: ATMEL Corporation

Figure 21-17. ASK Modulator Output
Figure 21-18. FSK Modulator Output
21.6.3.6
32059J–12/2010
Uptstream Frequency F0
Uptstream Frequencies
unipolar output
FSK Modulator
ASK Modulator
default polarity
[F0, F0+offset]
unipolar output
default polarity
NRZ stream
NRZ stream
Manchester
Manchester
Synchronous Receiver
encoded
encoded
Output
Output
data
data
Txd
Txd
1
1
switches to receiving mode. The demodulated stream is sent to the Manchester decoder.
Because of bit checking inside RF IC, the data transferred to the microcontroller is reduced by a
user-defined number of bits. The Manchester preamble length is to be defined in accordance
with the RF IC configuration.
In synchronous mode (SYNC = 1), the receiver samples the RXD signal on each rising edge of
the Baud Rate Clock. If a low level is detected, it is considered as a start. All data bits, the parity
bit and the stop bits are sampled and the receiver waits for the next start bit. Synchronous mode
operations provide a high speed transfer capability.
Configuration fields and bits are the same as in asynchronous mode.
Figure 21-19
illustrates a character reception in synchronous mode.
0
0
0
0
1
1
AT32UC3B
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