NSW-6
System Module SE2
PAMS Technical Documentation
Page 13
Issue 1 12/99
Nokia Mobile Phones Ltd.
Digital Data Channel
Digital Data Channel is supported in the product.
Out of Range mode (OOR)
If the phone cannot find signal from the base station on any control chan-
nel (analog or digital) it can go into OOR mode for power saving.
All RF circuits are powered off and baseband circuits are put into low
power mode, VCXO is stopped and only sleep clock is running in MAD
and CCONT. After the programmable timer in MAD has elapsed the
phone turns receiver on and tries to receive signalling data from base sta-
tion. If it succeeds, the phone goes to standby mode on analog or digital
control channel. If the connection can not be established the phone will
return to out of range mode, until the timer elapses again.
Locals Mode
Locals mode is used by product development, production and after sales,
for testing purposes. MCU’s Cellular Software is stopped (no signalling to
base station), and the phone is controlled by MBUS messages from test
PC.
Technical Summary
List of Submodules
Submodule
Function
CTRLU
Control Unit for the phone, comprising MAD ASIC (MCU, DSP,
System Logic) and Memories
PWRU
Power supply, comprising CCONT and CHAPS
AUDIO_RF_IF
Audio coding and RF–BB interface, COBBA
UI
User Interface components
These blocks are only functional blocks and therefore have no type nor
material codes. For block diagram, see baseband schematics.
The battery voltage range in DCT3 family is 3.0V to 4.5V depending on
the battery charge and used cell type (Li–Ion or NiMH). Because of the
battery voltage the baseband supply voltage is a nominal of 2.8V.
The baseband is running from a 2.8V power rail which is supplied by a
power controlling asic (CCONT). In the CCONT there are seven
individually controlled regulator outputs for the RF section, one 2.8V
output for the baseband plus a core voltage for MAD1. In addition there is
one +5V power supply output(V5V). A real time clock function is integrated
into the CCONT which utilizes the same 32KHz clock supply as the sleep
clock. A backup power supply is provided for the RTC which keeps the
