UBX-G7020 - Hardware Integration Manual
Design-in
GPS.G7-HW-10003
Objective Specification
Page 11 of 74
2.1.1.2
Core domain
The voltage for the core domain is generated by LDO_C and is supplied by V_CORE. The core domain is the main
digital power domain and consists of the largest blocks in the chip and sinks most of the current. When it is
switched off, the RF power domain is also switched off.
The core domain requires the backup domain to be alive.
2.1.1.3
RF domain
The voltage for the RF domain is generated by LDO_RF and is supplied by V_CORE. This RF domain supplies most
of the analogue RF section.
The LDO_RF_OUT is used to supply VDD_ANA and VDD_LNA.
The RF domain needs the core domain to be alive.
2.1.1.4
Clock domain
The voltage for the clock domain is generated by LDO_X and is normally supplied by VDD_IO. If the “single
crystal” feature is enabled to provide the RTC function (see section RTC) and there is a power failure at VDD_IO
then the LDO_X input will be switched over to V_BCKP to supply the clock domain
The LDO_X provides the supply for the oscillator and all the clock related circuits.
When a TCXO is used, the LDO_X_OUT voltage has to be used to supply or enable it. The LDO_X_OUT voltage is
configurable and has to meet the TCXO power supply voltage. See section 2.4.5.
The clock power domain requires the backup domain to be alive.
If a TCXO is used, LDO_X_OUT has to be used to supply or enable it.
Remember to configure the LDO_X_OUT voltage according to the TCXO supply or enable voltage.
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