AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 578

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

Figure 33-18. ASK Modulator Output
Figure 33-19. FSK Modulator Output
33.7.3.7
Figure 33-20. Synchronous Mode Character Reception
6438F–ATARM–21-Jun-10
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
Example: 8-bit, Parity Enabled 1 Stop
Baud Rate
Sampling
Clock
RXD
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 33-20
Start
illustrates a character reception in synchronous mode.
D0
D1
0
0
D2
D3
D4
0
0
D5
D6
D7
Parity Bit
AT91SAM9G45
Stop Bit
1
1
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