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RM510Q-GL can also be reprogrammed to PCIe mode based on eFuse. If the communication is switched
to PCIe mode by burnt eFuse, the communication cannot be switched back to USB mode.
Note that if the host does not support firmware upgrade through PCIe, the firmware can be upgraded by
the PCIe Card EVB, which could be inserted into a PC. For more details, see document [6].
3.3. Power Supply
The following table shows pin definition of VCC pins and ground pins.
Table 7: Definition of VCC and GND Pins
Pin
2, 4, 70, 72, 74
3, 5, 11, 27, 33, 39, 45,
51, 57, 71, 73
3.3.1. Decrease Voltage Drop
The input power supply range of the module is from 3.135 V to 4.4 V. Please ensure that the input voltage
will never drop below 3.135 V, otherwise the module will be powered off automatically. The voltage ripple
of the input power supply should be less than 100 mV, and the maximum voltage drop should be less than
165 mV, as shown by the following figure.
VCC 3.7 V
Voltage Drop
Figure 5: Power Supply Limits during Radio Transmission
Ensure the continuous current capability of the power supply is 5.0 A. To decrease voltage drop, two
energy storage capacitors of 220 µF with low ESR should be used, and a multi-layer ceramic chip
capacitor (MLCC) array also should be used due to its ultra-low ESR. It is recommended to use four
ceramic capacitors (1 µF, 100 nF, 33 pF, 10 pF) for composing the MLCC array, and place these
capacitors close to VCC pins. The width of VCC trace should be no less than 2.0 mm. In principle, the
longer the VCC trace is, the wider width it should be.
RM510Q-GL_Hardware_Design
Pin Name
I/O
VCC
PI
GND
Burst Transmission
RM510Q-GL Hardware Design
Description
Power supply
Ground
Burst Transmission
5G Module Series
DC Characteristics
3.135–4.4 V
3.7 V typical DC supply
Voltage Ripple
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