User Guide

NSB-5
System Module PAMS Technical Documentation
Page 30 Nokia Mobile Phones Ltd. Issue 1 03/01
Note: CCONT includes five additional 2.8V regulators providing power to the RF section. These reg-
ulators 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 the listed the MAD control lines and the regu-
lators they control:
- TxPwr controls VTX regulator (VR7)
- RxPwr controls VRX regulators (VR2 and VR5)
- SynthPwr controls VSYN_1 and VSYN_2 regulators (VR1_SW and VR4)
VCXOPwr controls VXO regulator (VR1)
CCONT generates also a 1.5 V reference voltage VREF to COBBA, SUMMA, and CRFU. The
VREF voltage is also used as a reference to some of the CCONT A/D converters.
In addition to the above-mentioned signals, MAD includes TXP control signal, which goes
to SUMMA power control block and to the power amplifier. The transmitter power con-
trol TXC is led from COBBA to SUMMA.
Audio Control
The audio control and processing is handled by the COBBA–GJP, which contains the
audio and RF codecs, and the MAD2, which contains the MCU, ASIC, and DSP blocks
handling and processing the audio signals.
Table 8: Regulator States for Different Modes of Operation
Operating mode Vref RF REG VCOBBA 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 On Pull down
Sleep
Off
Off Off On On On/off