The 0Ω resistors should be added in series between the module and the (U)SIM card connector so
as to facilitate debugging. The 33pF capacitors are used for filtering interference of EGSM900.
Please note that the (U)SIM peripheral circuit should be close to the (U)SIM card connector.
In order to offer good ESD protection, it is recommended to add a TVS diode array whose parasitic
capacitance should not be more than 50pF. The 22 ohm resistors should be added in series between
the module and the USIM card so as to suppress EMI spurious transmission and enhance ESD
The resistance values suggested by the two documents are different. What value should I use?
0Ω or 22Ω ?