Nokia NSW-6 Series Guide

PAMS Technical Documentation
NSW-6 Series Transceivers
Issue 1 12/99 Nokia Mobile Phones Ltd.
System Module SE2

NSW-6
System Module SE2 PAMS Technical Documentation
Page 2 Issue 1 12/99
Nokia Mobile Phones Ltd.
AMENDMENT RECORD SHEET
Amendment
Number Date Inserted By Comments
12/99 OJuntune

NSW-6
System Module SE2
PAMS Technical Documentation
Page 3
Issue 1 12/99 Nokia Mobile Phones Ltd.
CONTENTS
Page No
Transceiver NSW–6 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Connectors and Main Interfaces 7. . . . . . . . . . . . . . . . . .
External and Internal Connectors 7. . . . . . . . . . . . . . . . . . . . . . .
Contacts Description 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Connector 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging Connector 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset Connector 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Module, Functional Description 11. . . . . . . . . . . . . . . . . .
Modes of Operation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Control Channel mode (ACCH) 11. . . . . . . . . . . . . . . .
Analog Voice Channel Mode (AVCH) 11. . . . . . . . . . . . . . . . .
Digital Control Channel Mode (DCCH) 12. . . . . . . . . . . . . . . .
Digital Traffic Channel Mode (DTCH) 12. . . . . . . . . . . . . . . . .
Out of Range mode (OOR) 13. . . . . . . . . . . . . . . . . . . . . . . . . .
Locals Mode 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Submodules 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Submodules 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CTRLU 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MCU main features 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSP Main Features 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Logic main Features 17. . . . . . . . . . . . . . . . . . . . . . . . .
Memories 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUDIO–RF 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COBBA Main Features 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWRU 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CCONT Main Features 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPS Main Features 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clocking 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Clock 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sleep Clock 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resets 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power–up reset 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other reset 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power up with a charger 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Battery voltage 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
Empty Battery 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NSW-6
System Module SE2 PAMS Technical Documentation
Page 4 Issue 1 12/99
Nokia Mobile Phones Ltd.
Power Up by IBI 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mixed Trigger to power up 25. . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Down 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controlled Power Down 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Down pushing PWR key 25. . . . . . . . . . . . . . . . . . . .
Power Down when the battery voltage is discharged 25.
Power Down with fault in transmitter 25. . . . . . . . . . . . . . . .
Uncontrolled Power Down 25. . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Down when Watchdog expires 25. . . . . . . . . . . . . .
Battery Disconnected 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Disconnected when charger is connected 26. . . .
Sleep Mode 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering the Sleep mode 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waking up from the Sleep mode 26. . . . . . . . . . . . . . . . . . . . .
Charging Control 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two–wire Charging 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three–wire Charging 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watchdog 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Overvoltage Protection 28. . . . . . . . . . . . . . . . . . . . . . .
Battery Identification 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Temperature 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Voltage Regulators 30. . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Control 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Microphone and Earpiece 32. . . . . . . . . . . . . . . . . . . .
External Audio Connections 33. . . . . . . . . . . . . . . . . . . . . . . . .
Audio Accessory Detection 33. . . . . . . . . . . . . . . . . . . . . . . .
Internal Audio Connections (speech processing) 33. . . . . . .
4–wire PCM Serial Interface 34. . . . . . . . . . . . . . . . . . . . . . . . .
Speech Processing 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alert Signal Generation 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Control 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAD 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memories 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Memory 16MBit Flash 37. . . . . . . . . . . . . . . . . . . .
SRAM Memory 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EEPROM Emulated in FLASH Memory 37. . . . . . . . . . . . .
Flash Programming 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Module 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Frequency Plan 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Diagram 40. . . . . . . . . . . . . . . . . . . . . . . . . .
Regulators 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAMPS800 RX 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NSW-6
System Module SE2
PAMS Technical Documentation
Page 5
Issue 1 12/99 Nokia Mobile Phones Ltd.
TDMA 1900 RX 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequency Synthesizers 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAMPS 800 operation 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDMA 1900 operation 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAMPS800 TX 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDMA1900 TX 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAMPS800/TDMA1900 operation 45. . . . . . . . . . . . . . . . . . . . . .
Supply voltages in different modes of operation 45. . . . . . . .
Software Compensations 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Levels (TXC) vs. Temperature 46. . . . . . . . . . . . . . . . .
Power Levels (TXC) vs. Channel 46. . . . . . . . . . . . . . . . . . . . .
Power levels vs. Battery Voltage 46. . . . . . . . . . . . . . . . . . . . .
TX Power Up/Down Ramps 46. . . . . . . . . . . . . . . . . . . . . . . . .
Digital Mode RSSI 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Block Specifications 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DAMPS 800MHz RX Front End 47. . . . . . . . . . . . . . . . . . . . . .
TDMA 1900MHz RX Front End 47. . . . . . . . . . . . . . . . . . . . . .
SAW Filter 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog IF parts 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital IF parts 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TX Power levels 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synthesizers 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UHF Synthesizers specification 51. . . . . . . . . . . . . . . . . . . .
VHF Synthesizers specification 51. . . . . . . . . . . . . . . . . . . .
Output levels 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF/BB interface signals 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Lists 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Module SE2 (0201320) 57. . . . . . . . . . . . . . . . . . . . . . . . .

NSW-6
System Module SE2 PAMS Technical Documentation
Page 6 Issue 1 12/99
Nokia Mobile Phones Ltd.
CONTENTS
Schematics/ Layouts
Block Diagram of SE2 Module (Version 5100 Edit 118) 3A–1. . . . . . .
Circuit Diagram of BB (Version 5100 Edit 355) 3A–2. . . . . . . . . . . . . .
Circuit Diagram of CTRLU Block (Version 5100 Edit 400 ) 3A–3. . .
Circuit Diagram of PWRU (Version 5100 Edit 402 ) 3A–4. . . . . . . .
Circuit Diagram of Audio (Version 5100 Edit 315) 3A–5. . . . . . . . . .
Circuit Diagram of Receiver (Version 5100 Edit 229) 3A–6. . . . . . . .
Circuit Diagram of Synthesizer Block (Version 5100 Edit 188) 3A–7
Circuit Diagram of Transmitter (Version 5100 Edit 566) 3A–8. . . . . .
Circuit Diagram of RF–BB (Version 5100 Edit 101) 3A–9. . . . . . . . . .
Circuit Diagram of UI (Version 5100 Edit 173) 3A–10. . . . . . . . . . . . . .
Layout Diagram of JM1 1/2 3A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout Diagram of JM1 2/2 3A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NSW-6
System Module SE2
PAMS Technical Documentation
Page 7
Issue 1 12/99 Nokia Mobile Phones Ltd.
Transceiver NSW–6
Introduction
The NSW–6 is a dual band triple mode radio transceiver designed for the
DAMPS and TDMA1900 networks, with 9 power levels and a maximum
output of 480mW.
The transceiver comprises of a System/RF module SE2 with integrated
user interface and assembly parts.
The transceiver features a full graphic display and a two soft–key based
user interface. The antenna is internal. External antenna connection is
not included. The transceiver also features a leakage tolerant earpiece
and a noise cancelling microphone.
External Connectors and Main Interfaces
External and Internal Connectors
Supply Voltages and Power Consumption
Connector Line Symbol Minimum Typical /
Nominal Maximum/ Peak Unit / Notes
Charging VIN 7.1 8.4 9.3 V/ Travel charger,
ACT–1
Charging VIN 7.25 7.6 7.95 V/ Travel charger.
ACP–7, ACP–8
Charging I / VIN 720 800 850 mA/ Travel charger,
ACT–1
Charging I / VIN 320 370 420 mA/ Travel charger,
ACP–7

NSW-6
System Module SE2 PAMS Technical Documentation
Page 8 Issue 1 12/99
Nokia Mobile Phones Ltd.
Battery contact signals
Pin Line
Symbol Parameter Mini- mum Typical / Nomi-
nal
Maxi-
mum Unit / Notes
1 BVOLT Battery voltage 3.0 3.6 5.3 V/ Maximum voltage in idle
mode with a charger con-
nected
2 BSI Input voltage 0 2.85 V/ Battery size indication
Phone has 100k pull up re-
sistor
Battery indication
it
181% kohm/ Ni battery
resistor 20 22 24 kohm/ service battery
27 51 kohm/ 4.1V Li battery
68 91 kohm/ 4.2V Li battery
3 BTEMP Input voltage
Input voltage 0 2.1 1.4 3V/ Battery temp. indication V/ Phone power up (pulse)
4 BGND 0 0 V
Contacts Description
The transceiver electronics consist of the Radio Module ie. RF + System
blocks, the keyboard PCB, the display module and audio components.
The keypad and the display module are connected to the Radio Module
with connectors. System blocks and RF blocks are interconnected with
PCB wiring. The Transceiver is connected to accessories via charger con-
nector (includes jack and plates), and headset connector.
The System blocks provide the MCU, DSP and Logic control functions in
MAD ASIC, external memories, audio processing and RF control hard-
ware in COBBA ASIC. Power supply circuitry CCONT ASIC delivers oper-
ating voltages both for the System and the RF blocks.
The RF block is designed for a handportable phone which operates in the
TDMA system. The purpose of the RF block is to receive and demodulate
the radio frequency signal from the base station and to transmit a modu-
lated RF signal to the base station

NSW-6
System Module SE2
PAMS Technical Documentation
Page 9
Issue 1 12/99 Nokia Mobile Phones Ltd.
Battery Connector
Battery contact signals
Pin Name Min Typ Max Unit Notes
4 BVOLT 3.0 3.6 4.5
50
VBattery voltage
Maximum voltage in call state with charger
5
.
0
5.3
Maximum
voltage
in
call
state
with
charger
Maximum voltage in idle state with charger
3 BSI 0 2.85 V Battery size indication
Phone has 100kohm pull up resistor.
SIM Card removal detection
(Threshold is 2.4V@VBB=2.8V)
181% kohm Battery indication resistor (Ni battery)
20 22 24 kohm Battery indication resistor (service battery)
33+/1 kohm Battery indication resistor (4.1V 600 mAh Lith-
ium battery)
47+/–
10% kohm Battery indication resistor (Flash adapter)
2 BTEMP 0 1.4 V Battery temperature indication
Phone has a 100k (+–5%) pullup resistor,
Battery package has a NTC pulldown resistor:
47k+–5%@+25C , B=4050+–3%
2.1
1 10 3 20 V ms Phone power up by battery (input) Power up pulse width
1.9
90 100 2.85 200 V ms Battery power up by phone (output) Power up pulse width
1 BGND 0 0 V Battery ground
Charging Connector
Contact Line Symbol Function
DC–jack side contact
(DC–plug ring) L_GND Charger ground
DC–jack center pin VIN Charger input voltage
DC–jack side contact
(DC–plug jacket) CHRG_CTRL Charger control output (from phone)

NSW-6
System Module SE2 PAMS Technical Documentation
Page 10 Issue 1 12/99
Nokia Mobile Phones Ltd.
Pin Name Min Typ Max Unit Notes
2, b VIN 7.25
3.25
320
7.6
3.6
370
7.95
16.9
3.95
420
V
V
V
mA
Unloaded ACP–7 Charger (5kohms
load)
Peak output voltage (5kohms load)
Loaded output voltage (10ohms load)
Supply current
7.1
3.25
720
8.4
3.6
800
9.3
3.95
850
V
V
mA
Unloaded ACP–9 Charger
Loaded output voltage (10ohms load)
Supply current
3, a L_GND 0 0 V Supply ground
4, c CHRG_
CTRL
0 0.5 V Charger control PWM low
C
TRL 2.0 2.85 VCharger control PWM high
32 Hz PWM frequency for a fast charger
1 99 % PWM duty cycle
Headset Connector
The contacts of the headset connector are listed below, with the help of
the diagram of the headset plug.
1234/5
HEADSET
PLUG
Contact Line Symbol
1. contact (plug ring 1) XMICN
2. contact (plug ring 2) XEARN
3. contact (plug ring 3) XMICP
4. and 5. contact (center pin) XEARP (4) / HEADSETINT (5)

NSW-6
System Module SE2
PAMS Technical Documentation
Page 11
Issue 1 12/99 Nokia Mobile Phones Ltd.
Baseband Module, Functional Description
Modes of Operation
The phone has the following main operating modes
– Analog mode, on 800 MHz band
– Analog Control Channel ACCH
– Analog Voice Channel AVCH
– Digital mode, on 800 MHz band
– Digital Control Channel DCCH
– Digital Traffic Channel DTCH
– Digital mode, on 1900 MHz band
– Digital Control Channel DCCH
– Digital Traffic Channel DTCH
– Out Of Range –mode OOR
– Locals mode
Analog Control Channel mode (ACCH )
On analog control channel the phone receives continuous signalling
messages on Forward Control Channel (FOCC) from base station, being
most of the time in IDLE mode. Only the receiver part is on. Occasionally
the phone re–scans control channels in order to find the stronger or
otherwise preferred control channel.
Also registration (TX on) happens occasionally, whereby the phone sends
its information on Reverse Control Channel (RECC) to base station and
the phone’s location is updated in the switching office.
If a call is initiated, either by the user or base station, the phone moves to
analog voice channel or digital traffic channel mode depending on the
orders by the base station.
Analog Voice Channel Mode (AVCH)
The phone receives and transmits analog audio signal. All circuitry is
powered up except digital rx–parts. In this mode the DSP does all the au-
dio processing and in the Hands Free (HF) mode it also performs echo–
cancellation and the HF algorithm. COBBA performs the AD–conversion
for the MIC signal, and the DA–conversion for the EAR signal.

NSW-6
System Module SE2 PAMS Technical Documentation
Page 12 Issue 1 12/99
Nokia Mobile Phones Ltd.
With audio signal also SAT (Supervisory Audio Tone) is being received
from the base station. The SAT signal can be 5970 Hz, 6000Hz or 6030
Hz, the frequency being defined by the base station. DSP’s DPLL phase
lock loops to SAT, detects if the SAT frequency is the expected one and
examines the signal quality. DSP reports SAT quality figures to MCU reg-
ularly. The received SAT signal is transponded (transmitted back) to base
station.
The base station can send signalling messages on Forward Voice Chan-
nel (FVC) to the phone, by replacing the audio with a burst of Wide Band
Data (WBD). Typically these are handoff or power level messages. Sys-
tem Logic RX–modem is used for receiving the signalling message burst,
after which it gives interrupt to MCU for reading the data. During the burst
audio path must be muted; MCU gives message to DSP about this. MCU
can acknowledge the messages on Reverse Voice Channel (RVC), where
DSP sends the WBD to transmitter RF.
Also Signalling Tone (ST) can be transmitted to acknowledge messages
from base station. DSP sends ST after MCU’s command.
On Analog Voice Channel MCU uses sleep mode (HW DEEP SLEEP)
most of the time, but other circuits are fully operational.
Digital Control Channel Mode (DCCH)
On digital control channel (DCCH) DSP receives the paging information
from the Paging channels. DSP sends messages to MCU for processing
them.
Each Hyperframe (HFC) comprises two Superframes (SF), the first as
the Primary (p) and the second as the Secondary (s) paging frame. The
assigned Page Frame Class (PFC) defines the frames which must be re-
ceived, and thus it also defines when the receiver must be on; i.e. the
basic power consumption is defined at the same time.
The phone employs sleep mode between received time slots. Then DSP
sets the sleep clock timer and MCU, DSP and RF including VCXO are
powered down. Only sleep clock and necessary timers are running.
From DCCH phone may be ordered to analog control channel or to ana-
log or digital traffic channel.
Digital Traffic Channel Mode (DTCH)
Digital Voice Channel
On digital voice channel DSP processes speech signal in 20 ms time
slots. DSP performs the speech and channel functions in time shared
fashion and sleeps whenever possible. Rx and tx are powered on and off
according to the slot timing. MCU is waken up mainly by DSP, when
there is signalling information for the Cellular Software.

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

NSW-6
System Module SE2 PAMS Technical Documentation
Page 14 Issue 1 12/99
Nokia Mobile Phones Ltd.
real time clock running when the main battery is removed. The backup
power supply is a rechargeable polyacene battery with a backup time of
ten minutes.
The interface between the baseband and the RF section is handled by a
specific asic. The COBBA_D asic provides A/D and D/A conversion of the
in–phase and quadrature receive and transmit signal paths and also A/D
and D/A conversions of received and transmitted audio signals to and
from the UI parts. Data transmission between the COBBA_D and the MAD
is implemented using serial connections. Digital speech processing is
handled by the MAD asic. The COBBA_D asic is a dual supply voltage
circuit, the digital parts are running from the baseband supply VBB and
the analog parts are running from the analog supply VCOBBA (VR6).
Block diagram for the phone is below.
CCONT
LCD
MAD1
CHAPS
COBBA_P
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLY
TX/RX SIGNALS
BASEBAND
VBAT
+
MEMORIES
COBBA SUPPLY
AUDIOLINES
32kHz
CLK
19.44M
CLK
SLEEP CLOCK
SYSTEM CLOCK
vibra
motor
NiMH LiIon
core voltage
CHARGER conn
Baseband Submodules
CTRLU
CTRLU comprises MAD ASIC (MCU, DSP, System Logic) and Memories.
The environment consists of two memory circuits; (FLASH, SRAM),
22–bit address bus, and 16–bit data bus. Also there are ROM1SELX,
ROM2SELX, and RAMSELX signals for chip selection.

NSW-6
System Module SE2
PAMS Technical Documentation
Page 15
Issue 1 12/99 Nokia Mobile Phones Ltd.
MCU main features
System control
Cellular Software (CS)
Cellular Software communicates with the switching office, and
performs call build–up, maintenance and termination.
Communication control
M2BUS is used to communicate to external devices. This in-
terface is also used for factory testing, service and mainten-
ance purposes.
User Interface (UI)
PWR–key, keyboard, LCD, backlight, mic, ear and alert (buz-
zer, vibra, led) control. Serial interface from MAD to LCD
(same as for CCONT).
Authentication
Authentication is used to prevent fraud usage of cellular
phones.
RF monitoring
RF temperature monitoring by VCXOTEMP, ADC in CCONT.
Received signal strength monitoring by RSSI, ADC in CCONT.
False transmission detection by TXF signal, digital IO–pin.
Power up/down and Watchdog control
When power key is pressed, initial reset (PURX) has happened
and default regulators have powered up in CCONT, MCU and
DSP take care of the rest of power up procedures (LCD, COB-
BA, RF). The MCU must regularly reset the Watchdog counter
in CCONT, otherwise the power will be switched off.
Accessory monitoring
Accessory detection by EAD (HEADSETINT), AD–converter in
CCONT.
Battery and charging monitoring
MCU reads the battery type (BTYPE), temperature (BTEMP)
and voltage (VBAT) values by AD–converter in CCONT, and
phone’s operation is allowed only if the values are reasonable.
Charging current is controlled by writing suitable values to
PWM control in CCONT.
MCU reads also charger voltage (VCHAR) and charging cur-
rent values (ICHAR).
Production/after sales tests and tuning
Flash loading, baseband tests, RF tuning
Control of CCONT via serial bus

NSW-6
System Module SE2 PAMS Technical Documentation
Page 16 Issue 1 12/99
Nokia Mobile Phones Ltd.
MCU writes controls (regulators on/off, Watchdog reset,
charge PWM control) and reads AD–conversion values. For
AD–conversions MCU gives the clock for CCONT (bus clock),
because the only clock in CCONT is sleep clock, which has a
too low frequency.

NSW-6
System Module SE2
PAMS Technical Documentation
Page 17
Issue 1 12/99 Nokia Mobile Phones Ltd.
DSP Main Features
DSP (Digital Signal Processor) is in charge of the channel and speech
coding according to the IS–136 specification. The block consists of a DSP
and internal ROM and RAM memory. The input clock is 9.72 MHz, and
DSP has its own internal PLL–multiplier. Main interfaces are to MCU, and
via System Logic to COBBA and RF.
System Logic main Features
– MCU related clocking, timing and interrupts (CTIM)
– DSP related clocking, timing and interrupts (CTID)
– DSP general IO–port
–reset and interrupts to MCU and DSP
– interface between MCU and DSP (API)
– MCU interface to System Logic (MCUif)
– MCU controlled PWMs, general IO–port and USART for MBUS (PUP)
– Receive Modem (Rxmodem)
– Interface to Keyboard, CCONT and LCD Drivers (UIF)
– Interface to MCU memories, address lines and chip select decoding
(BUSC)
– DSP interface to System Logic (DSPif)
– serial accessory interface (AccIf, DSP–UART)
– Modulation, transmit filter and serial interface to COBBA (MFI)
– Serial interface for RF synthesizer control (SCU)
Memories
The speed of FLASH and SRAM is 120 ns.
FLASH
– size 1024k * 16 bit, contains the main program code for the MCU, and
is able to emulate EEPROM.
SRAM
– size 128k * 16 bit
AUDIO–RF
Audio interface and baseband–RF interface converters are integrated into
COBBA circuit.
COBBA Main Features
The codec includes microphone and earpiece amplifier and all the neces-
sary switches for routing. There are two different possibilities for routing;

NSW-6
System Module SE2 PAMS Technical Documentation
Page 18 Issue 1 12/99
Nokia Mobile Phones Ltd.
internal and external devices. There are also all the AD– and DA– con-
verters for the RF interface.
DEMO block is used for FM–demodulation in analog mode.
A slow speed DA–converter provides automatic frequency control (AFC).
In addition, there is a DA–converters for transmitter power control (TXC).
COBBA also passes the RFC (19.44 MHz) to MAD as COBBACLK (9.72
MHz).
COBBA is connected to MAD via two serial buses:
– RXTXSIO, for interfacing the RF–DACs and DEMO; and also for audio
codec and general control. Signals used: COBBACLK (9.72 MHz, from
COBBA), COBBACSX, COBBASD (bi–directional data) and COBBA-
DAX (data ready flag for rx–samples).
– Codec SIO, for interfacing the audio ADCs / DACs (PCM–samples).
Signals: PCMDCLK (data clock 1.08 MHz / 1.215 MHz), PCMSCLK
(frame sync 8.0 kHz / 8.1 kHz), PCMTxdata and PCMRxdata.
PWRU
PWRU comprises CCONT circuit and CHAPS circuit.
CCONT Main Features
CCONT generates regulated supply voltages for baseband and RF.
There are seven 2.8 V linear regulators for RF, one 2.8 V regulator for
baseband, one special switched output (VR1_SW), one programmable 2
V output (V2V), one 3/5 V output, one 5 V output, and one 1.5 V +/– 1.5
% reference voltage for RF and COBBA.
Other functions include:
– power up/down procedures and reset logic
– charging control (PWM), charger detection
– watchdog
– sleep clock (32.768 kHz) and control
– 8–channel AD–converter.
CHAPS Main Features
CHAPS comprises the hardware for charging the battery and protecting
the phone from over–voltage in charger connector.
The main functions include
– transient, over–voltage and reverse charger voltage protection
– limited start–up charge current for a totally empty battery
– voltage limit when battery removed
– with SW protection against too high charging current

NSW-6
System Module SE2
PAMS Technical Documentation
Page 19
Issue 1 12/99 Nokia Mobile Phones Ltd.
Clocking
System Clock
. Clocking and resets
CCONT
BATTERY
VCXO
MAD COBBA
LCD–DRVR
19.44MHz
200mVpp–1Vpp
sine wave
9.72MHz
Square wave
2.8Vpp
SLCLK
PURX
RFCEN
VR1
COBBARESX
PWRONX
LCDRESXRFC
COBBACLK
CHAPS
32 kHz
RFCSETTLED
VCXO on RF provides the system clock for baseband (RFC). COBBA
squares the clock and divides it by two for MAD (COBBACLK).
This clock can be stopped by cutting supply voltage from VCXO (CCONT
regulator VR1) and started again by powering on the same regulator.
MAD controls it through RFCEN. It can be stopped only when both MCU
and DSP request that. It is always stopped in SLEEP–mode on control
channels. When the VCXO is stopped time is measures in MAD by using
the sleep clock SLCLK; when the programmable timer expires it gives in-
terrupt to DSP/MCU and MAD also starts the VCXO power supply by
RFCEN signal.
The same sleep clock is also used in the MBUS interface, to detect if
there is communication on the bus during sleep periods.
Inside MAD System Logic parts provide clock signal to both DSP and
MCU, and both internal clocks can be stopped individually for power sav-
ing. MCU can use either CLOCK STOP or HW STANDBY sleep mode.
Sleep Clock
CCONT makes 32.768 kHz sleep clock for MAD. This crystal oscillator in
CCONT_2’ starts to run only after the battery is connected and the phone

NSW-6
System Module SE2 PAMS Technical Documentation
Page 20 Issue 1 12/99
Nokia Mobile Phones Ltd.
has been started once. The SLCLK output is enabled only when the
baseband parts are powered up.
After the sleep periods, when the VCXO is restarted (by RFCEN), MAD
takes care that the clock is not used before it is properly settled. MAD out-
put RFCSETTLED prevents COBBA from using the clock during the set-
tling time (RFCSETTLED rises later than RFCEN), as well MAD internally
inhibits DSP and MCU during the same time. This settling time can be
programmed before going to sleep mode, and the sleep clock is used for
measuring the time.
Resets
Power–up reset
CCONT gives the power–up reset (PURX) to MAD and COBBA. Also dis-
play is reset via MAD output pin. During this reset the VCXO clock has
enough time to settle so that it can be used as the system clock after
reset.
Other reset
COBBA can be also internally reset; there are two internal reset bits in
COBBA registers which can be written by MAD.
LCD reset is possible also by by MCU SW, because the control pin pin is
controlled by MCU.
There are also MAD internal reset possibilities
– MCU can reset system logic parts
– MCU can reset DSP
– SW–watchdog can reset the whole MAD