BQ34Z100-G1: can't enter the full sleep mode

Dear all:

I  set the Full Sleep Wait Time =5 and Disconnect the communication, Measure the BQ34z100-G1  least power consumption about 80uA,wait a minute.the power consumption still about 80uA, It cannot be further reduced.I Want to make BQ34z100-g1 enter the full sleep mode,where still need to set?thanks a lot.