User guide

M80 EVB User Guide
M80_EVB_UGD_V1.2 - 20 -
Figure 17: Test points of PCM interface
Note: W681360 is not assembled in the EVB board. If this function is needed, please assemble
this component located at U301.
3.4. SIM Card
The SIM interface is powered from an internal regulator in the module. Both 1.8V and 3.0V SIM
Cards are supported.
The following two figures show the schematic of SIM1 card and the pins assignment of SIM1 card
respectively. SIM1 cassette has adopted an EINT to detect the SIM card.
Figure 18: Circuit of SIM1 card
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