docs: remove link to i2c specs

docs/en/api-reference/peripherals/i2c.rst

@@ -340,7 +340,7 @@ During driver installation, an interrupt handler is installed by default.
 Customized Configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
-As mentioned at the end of Section :ref:`i2c-api-configure-driver`, when the function :cpp:func:`i2c_param_config` initializes the driver configuration for an I2C port, it also sets several I2C communication parameters to default values defined in the `I2C specification <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_. Some other related parameters are pre-configured in registers of the I2C controller.
+As mentioned at the end of Section :ref:`i2c-api-configure-driver`, when the function :cpp:func:`i2c_param_config` initializes the driver configuration for an I2C port, it also sets several I2C communication parameters to default values defined in the I2C specification. Some other related parameters are pre-configured in registers of the I2C controller.
 
 All these parameters can be changed to user-defined values by calling dedicated functions given in the table below. Please note that the timing values are defined in APB clock cycles. The frequency of APB is specified in :c:macro:`I2C_APB_CLK_FREQ`.
 
@@ -372,7 +372,7 @@ You can also select different pins for SDA and SCL signals and alter the configu
 
 .. note::
 
-    {IDF_TARGET_NAME}'s internal pull-ups are in the range of tens of kOhm, which is, in most cases, insufficient for use as I2C pull-ups. Users are advised to use external pull-ups with values described in the `I2C specification <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_.
+    {IDF_TARGET_NAME}'s internal pull-ups are in the range of tens of kOhm, which is, in most cases, insufficient for use as I2C pull-ups. Users are advised to use external pull-ups with values described in the I2C specification. For help with calculating the resistor values see `TI Application Note <https://www.ti.com/lit/an/slva689/slva689.pdf>`_
 
 
 .. _i2c-api-error-handling:

docs/zh_CN/api-reference/peripherals/i2c.rst

@@ -24,7 +24,7 @@ I2C 驱动程序管理在 I2C 总线上设备的通信，该驱动程序具备
 .. only:: SOC_I2C_SUPPORT_SLAVE
 
     - 支持从机模式
-    
+
 - 读取并写入寄存器，然后由主机读取/写入
 
 
@@ -329,7 +329,7 @@ I2C 驱动程序管理在 I2C 总线上设备的通信，该驱动程序具备
 .. only:: not SOC_I2C_SUPPORT_SLAVE
 
     .. _i2c-api-interrupt-handling:
-    
+
 中断处理
 ^^^^^^^^^^^
 
@@ -340,7 +340,7 @@ I2C 驱动程序管理在 I2C 总线上设备的通信，该驱动程序具备
 用户自定义配置
 ^^^^^^^^^^^^^^^
 
-如本节末尾所述 :ref:`i2c-api-configure-driver`，函数 :cpp:func:`i2c_param_config` 在初始化 I2C 端口的驱动程序配置时，也会将几个 I2C 通信参数设置为 `I2C 总线协议规范 <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_ 规定的默认值。 其他一些相关参数已在 I2C 控制器的寄存器中预先配置。
+如本节末尾所述 :ref:`i2c-api-configure-driver`，函数 :cpp:func:`i2c_param_config` 在初始化 I2C 端口的驱动程序配置时，也会将几个 I2C 通信参数设置为 I2C 总线协议规范规定的默认值。其他一些相关参数已在 I2C 控制器的寄存器中预先配置。
 
 通过调用下表中提供的专用函数，可以将所有这些参数更改为用户自定义值。请注意，时序值是在 APB 时钟周期中定义。APB 的频率在 :c:macro:`I2C_APB_CLK_FREQ` 中指定。
 
@@ -372,7 +372,7 @@ I2C 驱动程序管理在 I2C 总线上设备的通信，该驱动程序具备
 
 .. 注解 ::
 
-    {IDF_TARGET_NAME} 的内部上拉电阻范围为几万欧姆，因此在大多数情况下，它们本身不足以用作 I2C 上拉电阻。建议用户使用阻值在 `I2C 总线协议规范 <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_ 规定范围内的上拉电阻。
+    {IDF_TARGET_NAME} 的内部上拉电阻范围为几万欧姆，因此在大多数情况下，它们本身不足以用作 I2C 上拉电阻。建议用户使用阻值在 I2C 总线协议规范规定范围内的上拉电阻。计算阻值的具体方法，可参考 `TI 应用说明 <https://www.ti.com/lit/an/slva689/slva689.pdf>`_
 
 
 .. _i2c-api-error-handling: