User Guide

CCS Technical Documentation 7 - RF Description & Troubleshooting
Company Confidential RH-4
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CPOUT
PLL
loop
filter
26MHz
RBEXT
RF_EN
RF_CLK
RF_DATA
RESET_X
VBEXT
XTALM
XTALP
REFOUT
REFOUT
VPLL
VDDCP
VDDPRE
VDDLO
VDDPLL
VDDXO
VREF1
VDDDL
VDDDIG
VDDBBB
VBB (1.8V)
2,7k
Vcp
supply
filter
SENSE
RESETX
INPLO
INMLO
PA vendor
indication
Rpa
Ref.
filter
3
RFBUSX
RFBUSDA
RFBUSCLK
Synth
supply
filter
Ref clk set
VR5
VR3
RFCONV_0(9)
VIO
VCOSENSE
VR2
VIO
SELADDR
GENIO6
VCXO
supply
filter
VR7
LPR
CLK
buffer
VCO
supply
filter
VR1A
5V
64/65
NDIV
ADIV
ϕ
Charge
Pump
RDIV
1/2 1/4
1/2 1/4
1/2
Buffer
LOCNT
REFCNT
Lock
Detect
Digital Control
Main Bias Circuit
Resistor Ext/R2H/R2
VDDRXBB
Sensor
BIST / Temp.
VDDTX
I/O level
shift
Buf/
AGC
VCXO Bias
R2H/R2
AFC/CAL
Control
RESETX
3
VDDRXBB
2 2 2 2
To DCS/PCS
Modulator
To GSM
Modulator
To DCS/PCS
RX mixer
To GSM RX
mixer
2 2 2 2