最終更新:2012-12-18 (火) 14:27:47 (2797d)  

レイテンシタイマー
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FTDI

  • The latency timer acts as a timeout on the receive buffer which will trigger the transmission of any data in the chip’s receive buffer back to the host.
    • In cases when the amount of data being received is minimal, this prevents applications from having to wait a long time for a full packet.
  • FTDI devices will return data to the host in 2 cases:
    • The IC has a full buffer of data to send back to the host.
    • The latency timer has expired.
  • デフォルトは16ms

FTDI USB Data Transfer Efficiency

  • 一度に受信したいデータサイズに合わせて調整するべき。

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