User's Manual Part 1
o The pull-up current cannot be increased to speed up rise time, because the
pull-up current must not exceed 1 mA including any crosstalk.
o Pull-up current is defined by the 4.7 k pull-up resistor (to USIM_PWR) on
the WWAN M.2 module, plus 200 µA from the baseband chip is
approximately 0.8 mA.
Place a decoupling capacitor close to the SIM card socket.
Some M.2 modules incorporate GPS and GLONASS receivers with aGPS to support
Global Positioning.
For M.2 modules that feature GNSS support, see Table 1, the M.2 module incorporates the
CG1960 Single-Chip GNSS Device, which is a complete receiver for simultaneous reception
and processing of both GPS and GLONASS signals. It includes LNA, mixer, bandpass filter,
VCO, ALC, fractional-N frequency synthesizer, digital tunable filters, PGA stage, and multi-
bit ADCs. A UART interface is used by the
X-GOLD™ Communications Processor on the M.2 module to control the GNSS
device. The
solution offers best-in-class acquisition and tracking sensitivity, TFF and accuracy.
The GNSS device supports several different power management modes which gives the
lowest possible energy usage per fix. The pre-calculated location data will be sent over the
USB host interface. In addition, the M.2 will produce GPS data when the system is in sleep
mode via an I2C interface to allow for applications to be available in low power modes.
GNSS General Features
Autonomous GPS / GLONASS
Assisted GPS Using SUPL 1.0/2.0
• MS Assisted positioning ( SET / NET Initiated )
• MS Based positioning ( SET / NET Initiated )
SUPL 2.0 Feature Sets
Version Negotiation
Periodic Triggers
Emergency Positioning
Area Event Triggers (SET Init & NET Init)
Application ID
Enhanced Cell Id
Multiple Location IDs
Session Info Query
Location Transfer to 3rd Party
Notification Verification Based on Current Location
Location Request to another SET
A diagram of the GNSS connections on the M.2 module is shown in Figure 6. This diagram
identifies the signals between the X-GOLD™ baseband and GNSS devices along with the
USB and GNSS signals available to the host at the card interface.