I2C从器件引脚怎么分配

我有CY8CKIT-00。I2C从属规范说，这个函数有任何引脚可用。
我正在尝试PIN P4（4）-SDA和P4 [ 6 } SSCL引脚（根据示例项目）。
然而，Psoc Creator不允许这样的任务：
“错误：APR.M010:IO”SCLYS（0）“不能放入”P4（6）中，因为PIN不支持IO所需的特性。（APP＝CysFIT）
据我所知，只有硬件专用引脚工作（P12 0和P12-1）
它涉及配置（UDB和固定函数）。
有人知道为什么吗？
模板项目回收开沟排水低（我可以使用加固拉出？）
当做
罗伯特·塞科科夫斯基



     以下为原文
  I have CY8CKIT-003. I2C Slave Spec says, there is any pin available for this function.
    I'm trying with pins P4[4]-SDA and P4[6} _SCL pins (according to example project).
    Psoc Creator however doesn't allow such assignment saying:
    "Error: apr.M0010: IO "SCL_S(0)" cannot be placed into "P4[6]" because the pin does not support the features required by the IO. (App=cydsfit)"
    As far as I figured out only hardware dedicated pins work (P12-0 and P12-1)
    And it's regardles of configuration (UDB nor Fixed FUnction)
    Does anyone know why?
    Template projects reccomends open drain low (can I use resitive pullup?)
    regards
    robert seczkowski