APP RX FFT

Figure 1 - APP RX FFT Overview

R3 architecture consists of following modules :

• Ethernet Port - Ethernet framing function,
  
  • Rx - receives ethernet frames from Host. Performs CRC checking, and forwards error free payload to packet processor.
  • Tx - transmits ethernet frames to Host. Generates Ethernet header and CRC, IP payload is provided by packet processor.
    

• Packet Processor - IP layer processing
  
  • Packet classification - RMAP, Data, and other (such as ARP and DHCP packets)
  • UDP is used for board level communication e.g. RMAP and Data packets

• APP - User specific application
  

• RF Port - DAC/ADC interfacing
  

• Control Plane - RMAP and RF control
  

• Timing Control - system wide clock control using clock enables
  

From Host, we can control the hardware (RMAP read/write operations) by sending RMAP ethernet frame messages. The packet classifier classifies and forwards packets according to its type :

• RMAP packets -> RMAP Processor
• Data packets -> Tx Buffer for APP processing
• Other packets -> TCP/IP stack

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