FR5739晶振电容配置问题！

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FR5739晶振电容配置问题！ [复制链接]

 FR5739并不像g2553可以内部配置电容，所以在接外部晶振时要外接电容才可以起振：

  (a) For XT1DRIVE = {0}, C L,ef f ≤ 6 pF.
  (b) For XT1DRIVE = {1}, 6 pF ≤ C L,ef f ≤ 9 pF.
  (c) For XT1DRIVE = {2}, 6 pF ≤ C L,ef f ≤ 10 pF.
  (d) For XT1DRIVE = {3}, 6 pF ≤ C L,ef f ≤ 12 pF.

  这是官方给的，建议用C L,ef f为6P