Sim supply, Schematic, 4 sim supply – Telit Wireless Solutions GE863-QUAD User Manual
Page 53: 5 schematic
GE863-QUAD
GE863-PY
1vv0300715 Rev. 1 - 19/09/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved
page 53 of 79
9.4 SIM Supply
Do not connect capacitance greater than 10nF to SIMVCC line.
Other notes:
- SIMIN doesn't require any pull-up resistor. It is built in.
- SIM card is detected inserted when this line is short to ground.
- If in the application the SIM holder doesn’t foresee the switch for the
presence/absence of the SIM card, the SIMIN line must be connected to ground.
9.5 SCHEMATIC
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