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MSP430FR5848: RST pin 2.2nF capacitance too high for Spy-Bi-Wire

Part Number: MSP430FR5848


I have a 47k pullup and 2.2nF circuit as recommended on the RST line, but I am getting a "device unknown" error when trying to debug or program with a MSP-FET430UIF over Spy-By-Wire.  Once I removed the 2.2nF capacitor everything works fine. 

My question is whether the 2.2nF is actually right on the limit for this device and if so what is the appropriate value?  There should not be too much extra capacitance in my circuit since the traces are only 2cm long and the connector is a standard T/H 0.1" header...


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