LPC5410 IO rising time too small

[Twang]

     Hello, I am a hardware engineer. When using your company's LPC5410 chip, I have some questions about the parameters of I/O pins in the datasheet.
    The tr and tf of the pin configured as input as described in 11.3 of the specification are between 0.3ns-1.3ns and 0.2ns-1.2ns. The data performance in the test process or tr and tf of the chip's own IO output are relatively small. May I ask if there is any error or update in the datasheet?

[xiangjun_rong]

Hi,

Of course, the data sheet can specifies the rising time and falling time of only output pins with predefined load capacitor, it can not specify the rising time and falling time of input pins, because the  rising time and falling time of input pin is only dependent on the external  source driving capability and the load capacitor.

So this is a typo of the documentation.

Hope it can help you

BR

XiangJun Rong