KAD/UAR/102 RS-232/RS-422/RS-485 universal asynchronous parser and snarfer - 4 channels

The KAD/UAR/102 is used to parse (coherently extract specific bytes) and snarf (send all data to a FIFO) up to four RS-232/422/485 channels. The module is able to parse and snarf each channel at the same time.  

The signal type (RS-232/422/485), bits per word and parity are programmable on a channel-by-channel basis. The bit-rates must be binary multiples of each other. 

In the parser, a total of up to 126 complete messages are triple buffered so that the stale indication is message-wide. Each message can be up to 512 characters (bytes) long (including start and stop characters). Each message is tagged to 0.1 ms resolution; a message is considered found when up to eight specific bytes are received.

The end of message byte is determined by a user-defined stop character or specific number of words. A message is not updated if any sequence is incorrect.

The snarfer stores all data from each bus in a separate FIFO 2K words deep.

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Features

  • Four independent input channels
  • Bit-rates from 300 bps to 1,000,000 bps
  • 7/8 bits per word with odd/even or no parity
  • Programmable start sequence (one to eight characters)
  • Programmable stop sequence (one character or by fixed length)
  • Locks on idle time
  • Parses up to 126 strings (messages) per module
  • Up to 512 characters (bytes) per message; minimum of four characters (bytes) per message
  • Time tagging (±0.1 ms)
  • Message wide stale (skipped) indication
  • First In, First Out (FIFO) is 2K words deep per channel
  • Two bits for FIFO full/empty

Applications

  • Receiving data from GPS module or onboard computer
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