Audio Control - Nokia NSB-5 Series Technical Documentation Manual

NSB-5
System Module
Table 8: Regulator States for Different Modes of Operation
Operating mode Vref
Power off
Off
Power on
On
Reset
On
Sleep
Off
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.
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RF REG VCOBBA
Off Off
On/Off On
Off On
VR1 On
Off Off
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PAMS Technical Documentation
VBB VSIM
Off Off
On On
On On
On On
SIMIF
Pull down
On/off
Pull down
On/off
Issue 1 03/01