xE922-3GR Hardware User Guide
1VV0301272
Rev.0.8 2017-01-05
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Page 56 of 112
NOTE FOR R1:
The resistor value on SIMIO pulled up to SIMVCC should be defined accordingly in order to
be compliant with 3GPP specification for USIM electrical testing. Rise/fall time of SIMIO line
should not exceed 1 µs.
The xE922-3GR module contains an internal 4.7 kOhm pull-up resistor on SIMIO which should
be sufficient in most applications.
For C1 a value of 1uF is recommended with the XE922-3GR product.
USIMx_DETECT line has no internal pull up activated, an external pullup resistor of typical
100 kOhm is required on the application main board.
Refer to the following document for more SIM integration recommendations:
·
SIM_Integration_Design_Guide_Application_Note_Rev10, 80000nt10001a
Note1:
Only SIM1 interface is active by default.
Please consult Intel Business Link Support (IBL) how to activate SIM2 interface
Note2:
USIM_DETECT mechanism is not enabled by default.
SIM detection is currently implemented via SW polling.
Please consult Intel Business Link Support (IBL) on HW SIM detection.