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R
TCXO
Fr
Counter
Fv
RFT6120
Rx-LO-IN
note：Red signal is the definition of RFT pins, blue signal is the definition of RFR pins, green signal is the definition
of interface.
RX-QP/RX-QM/RX-IM/RX-IP refers to the output of 4 baseband signals. They are
to be sent to MSM to be processed. SBST/SBCK/SBDT are 3 control BUSes.
MSM controls RFR6120 by controlling these three signals. The TCXO signal
provides clock reference signals for all internal components. Three categories of
power provide power for RFR: VREG-RFRX provides power voltage for PM6000;
VREG-TCXO provides voltage needed by the clock for RFR6120; VREG-MSMP
provides voltage for internal RFR6120 components. RF local oscillation signals
are for receiving/transmission channels to conduct down/up conversion operations.
Both channels share the same RF local oscillation signal.
LOCK
Digital logic
interface
Phase
checking
N
Counter
（RX-LO-BUFF）
Figure1-26
PLL circuit
24
（CP-RX）
SBIcontrol
RX-CP
RX-FAQ
Loop filter
RX-CP-HOLD
LO-OUT
VCO-FTUNE
RX
RFR6120
VCO
RX
LO
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