TMS320F280025: Capacitance used for VDD

Part Number: TMS320F280025

Dear Champs,

I am asking this for our customers.

On F28002x datasheet

https://www.ti.com/lit/ds/symlink/tms320f280025c.pdf?ts=1592557753480&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTMS320F280025C

It says the total capacitance,

1.2-V Digital Logic Power Pins. TI recommends placing a decoupling capacitor near each VDD pin with a total capacitance of approximately 22 μF.

However, on F28004x datasheet, it says, 

1.2-V Digital Logic Power Pins. TI recommends placing a decoupling capacitor near each VDD pin with a minimum total capacitance of approximately 20 μF. When not using the internal voltage regulator, the exact value of the decoupling capacitance should be determined by your system voltage regulation solution.

Questions:

1) Why the minimum capacitance is 20uF on F28004x, but it is 22uF on F28002x? Is there any concern?

2) Compare F280025 control card and F280049 control card, the capacitance used are same - 2x10uF + 4x0.1uF. Why the F280025 control card does not use capacitance larger than 22uF, but it's still same as that of F280049?

3) Which one should we follow? F280025 control card or F280025 datasheet?

Wayne Huang