User Guide

PAMS
Technical Documentation
NME–3
Technical Information
Page 29
Issue 1 10/99
Operating mode Vref RF REG VCOB-
BA
VBB VSIM SIMIF
Power off Off Off Off Off Off Pull
down
Power on On On/Off On On On On/Off
Reset On Off
VR1 On
On On Off Pull
down
Sleep On Off Off On On On/Off
Note: COBBA regulator is off in SLEEP mode. Its output pin may be fed from
V
BB
in SLEEP mode by setting bit RFReg(5) to ’1’ (default).
CCONT includes also five additional 2.8V regulators providing power to
the RF section. These regulators can be controlled either by the direct
control signals from MAD or by the RF regulator control register in
CCONT which MAD can update. Below are listed the MAD control lines
and the regulators they are controlling.
– TxPwr controls VTX regulator (VR5)
– RxPwr controls VRX regulator (VR2)
– SynthPwr controls VSYN_1 and VSYN_2 regulators (VR4 and VR3)
– VCXOPwr controls VXO regulator (VR1)
CCONT also generates a 1.5 V reference voltage VREF to COBBA,
PLUSSA and CRFU. The VREF voltage is also used as a reference to
some of the CCONT A/D converters.
In additon to the above mentioned signals MAD includes also TXP control
signals which go to PLUSSA power control block and to the power
amplifier. The transmitter power control TXC is led from COBBA to
PLUSSA.
Operating mode Vref RF REG VCOB-
BA
VBB VSIM SIMIF
Power off Off Off Off Off Off Pull
down
Power on On On/Off On On On On/Off
Reset On Off
VR1 On
On On Off Pull
down
Sleep On Off Off On On On/Off