About sim card. From Tech. guide of WMP100 page 51(3.10.3 Application) for proper sim card attachment to the module
a) I need to implement the D1(ESDA6VISC6 from ST) and D2 (DALC208SC6 from SGS-Thomson).
The D1&D2 come in between the WMP100 and sim card
Question: what if I will skip this D1&D2 components will the sim card work ?
About RTC. From Tech. guide of WMP100 page 100 :
“The pin “XIN_32K”(AC24) and pin “XOUT_32K” are used to connect a crystal which is MANDATORY to setup and
run the WMP100 module”
Question: Is the word mandatory mean that without connecting that crystal I won’t be able to turn module on, download the firmware
and my application ?
About on/off pin(U5). From Tech. guide of WMP100 page 85 (3.17)
“The voltage on pin on/off has to be maintained at 0.8xVBATT for 1500 ms to turn the module on”.
Question: what does 0,8xVBATT mean? Can I just connect “VBATT” pin with “on/off” pin like it show on page 86(Figure36) ?