Are there upper and lower limit of capacitance value connected to C_D and C_R terminal of R3150？

There is no upper or lower limit for the capacitance value of the external capacitors to the C_D and C_R pins of the R3150.
However, the following precautions should be taken when operating the IC to determine if there are any problems.

• When the capacitance value of the capacitor is increased :
  The delay time error due to supply voltage variation tends to increase.
• When the capacitance value is reduced :
  Parasitic capacitance inside the IC and on the board will have a larger effect on the delay time error.
  Also, the delay time cannot be shortened beyond a certain degree because of the delay time of the internal circuit of the IC and the parasitic capacitance of the board.