TPS65950 HFCLKIN Rise and Fall Time

Greetings,

From Table 12-3 of the TPS65950 data sheet, the HFCLKIN input rise time and fall time are specified to be 5 ns. How are these times measured (10 % to 90 % of the waveform, 20 % to 80 % of the waveform, etc) and into what load (in pF)?

Also, from Table 12-3, note (1) specifies a drive capability of 40 pF. Is this truly referring to the HFCLKIN input or is this a typo and is referring to the default output drive of the HFCLKOUT output (see text from the TPS65950 data sheet pasted below (sheet 134))?

When a device needs a clock signal other than 32.768 kHz, it makes a clock request and activates the CLKREQ pin. As a result, the TPS65950 immediately sets CLKEN to 1 to warn the clock provider in the system about the clock request and starts a timer (maximum of 5.2 ms using the 32.768-kHz clock). When the timer expires, the TPS65950 opens a gated clock, the timer automatically reloads the defined value, and a high-frequency output clock signal is available through the HFCLKOUT pin. The output drive of HFCLKOUT is programmable (minimum load 10 pF, maximum load 40 pF) and must be at 40 pF by default.