Nokia 8810 Service Manual 03SYS
PAMS Technical Documentation
NSE–6 Series Transceivers
Chapter 3
System Module
Original 08/98
NSE–6
PAMS
System Module
CONTENTS
Transceiver NSE–6 3 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 3 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Modes 3 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection Diagram 3 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Module 3 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External and Internal Connectors 3 – 7. . . . . . . . . . . . . . . . . . . . .
Contacts Description 3 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Module 3 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Diagram 3 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary 3 – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging Connector 3 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset Connector 3 – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service connections 3 – 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Connector 3 – 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SIM Card Connector 3 – 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Microphone in Slide 3 – 14. . . . . . . . . . . . . . . . . . . . . . .
RTC Backup Battery 3 – 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buzzer 3 – 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description 3 – 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution 3 – 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery charging 3 – 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup Charging 3 – 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Overvoltage Protection 3 – 18. . . . . . . . . . . . . . . . . . . .
Battery Removal During Charging 3 – 19. . . . . . . . . . . . . . . . . .
Different PWM Frequencies ( 1Hz and 32 Hz) 3 – 20. . . . . . .
Battery Identification 3 – 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Temperature 3 – 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Voltage Regulators 3 – 22. . . . . . . . . . . . . . . . . . . . . . . .
Switched Mode Supply VSIM 3 – 24. . . . . . . . . . . . . . . . . . . . . .
Power Up 3 – 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power up with a charger 3 – 25. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up With The Power Switch (PWRONX) 3 – 25. . . . . . .
Power Up by RTC 3 – 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up by IBI 3 – 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acting Dead 3 – 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active Mode 3 – 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sleep Mode 3 – 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 3 – 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Off 3 – 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watchdog 3 – 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio control 3 – 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Audio Connections 3 – 29. . . . . . . . . . . . . . . . . . . . . . .
Analog Audio Accessory Detection 3 – 30. . . . . . . . . . . . . . . . .
Technical Documentation
Page 3 – 2
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PAMS
NSE–6
Technical Documentation
Headset Detection 3 – 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Audio Connections 3 – 31. . . . . . . . . . . . . . . . . . . . . . . .
4–wire PCM Serial Interface 3 – 31. . . . . . . . . . . . . . . . . . . . . . .
Alert Signal Generation 3 – 32. . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Control 3 – 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAD2 3 – 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memories 3 – 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Memory 3 – 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRAM Memory 3 – 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EEPROM Memory 3 – 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MCU Memory Map 3 – 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flash Programming 3 – 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COBBA–GJ 3 – 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Real Time Clock 3 – 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RTC backup battery charging 3 – 44. . . . . . . . . . . . . . . . . . . . . .
Vibra Alerting Device 3 – 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IBI Accessories 3 – 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phone Power–on by IBI 3 – 45. . . . . . . . . . . . . . . . . . . . . . . . . . .
IBI power–on by phone 3 – 45. . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Module 3 – 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Ratings 3 – 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Frequency Plan 3 – 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Diagram 3 – 47. . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics 3 – 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulators 3 – 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Signals 3 – 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description 3 – 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequency synthesizers 3 – 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver 3 – 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter 3 – 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AGC strategy 3 – 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AFC function 3 – 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver blocks 3 – 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RX interstage filter 3 – 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1st mixer in CRFU_1a 3 – 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1st IF–filter 3 – 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Blocks 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TX interstage filter 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power amplifier module 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synthesizer blocks 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VHF VCO and low pass filter 3 – 56. . . . . . . . . . . . . . . . . . . . . . . .
UHF PLL 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UHF PLL block in SUMMA 3 – 56. . . . . . . . . . . . . . . . . . . . . . . . . .
UHF VCO module 3 – 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UHF local signal input in CRFU_1a 3 – 57. . . . . . . . . . . . . . . . . . .
System Module
Original 08/98
Page 3 – 3
NSE–6
PAMS
System Module
Connections 3 – 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF baseband signals 3 – 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timings 3 – 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synthesizer control timing 3 – 60. . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter power switching timing diagram 3 – 62. . . . . . . . . . .
Synthesizer clocking 3 – 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts list of US8 (EDMS Issue 7.13) Code: 0201187 3 – 63. . . . . . . . .
Schematic Diagrams: US8
Block Diagram of UIF 3/A3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram of UIF (Version 7.0 Edit 218) for layout version 07 3/A3–2
Block Diagram of Baseband 3/A3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram of Baseband (Version 7.0 Edit 105) for layout 07 3/A3–4
Technical Documentation
Circuit Diagram of Power Supply (Version 7.0 Edit 257) for layout 07 3/A3–5
Circuit Diagram of SIM Connectors (Version 7.0 Edit 71) for layout 07 3/A3–6
Circuit Diagram of CPU Block (Version 7.0 Edit 208) for layout 07 3/A3–7
Circuit Diagram of Audio (Version 7.0 Edit 126) for layout 07 3/A3–8
Circuit Diagram of IR Module (Version 7.0 Edit 96) for layout 07 3/A3–9
RF Block Diagram 3/A3–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram of RF Block (Version 1.0 Edit 244) for layout 07 3/A3–11
Layout Diagram of US8 – Top (Version 07) 3/A3–12. . . . . . . . . . . . . . . . .
Layout Diagram of US8 – Bottom (Version 07) 3/A3–12. . . . . . . . . . . . . .
Testpoints of US8 – Top (Version 07) 3/A3–13. . . . . . . . . . . . . . . . . . . . . .
Testpoints of US8 – Bottom (Version 07) 3/A3–13. . . . . . . . . . . . . . . . . . .
Testpoint references (Version 07) 3/A3–14. . . . . . . . . . . . . . . . . . . . . . . . .
Page 3 – 4
Original 08/98
PAMS
NSE–6
Technical Documentation
Transceiver NSE–6
Introduction
The NSE–6 is a radio transceiver unit designed for the GSM network. It is a
GSM phase 2 power class 4 transceiver providing 15 power levels with a
maximum output power of 2 W. The transceiver is a true 3 V transceiver.
The transceiver consists of System/RF module (US8), Keyboard module
(UK8) and assembly parts.
The transceiver has full graphic display and two soft key based user interface. The antenna is internal. External antenna connection is not available. The transceiver has leakage tolerant earpiece and noise cancelling
microphone. Integrated IR link provide connection for two NSE–6 transceivers or NSE–6 transceiver and PC.
The plug–in SIM ( Subscriber Identity Module ) card is located inside the
phone, slot for inserting is in the left side of the phone, accessable when
battery is removed and slide is open.
System Module
Operation Modes
There are six different operation modes:
– power off mode
– idle mode
– NSPS mode
– active mode
– charge mode
– local mode
In the power off mode only the circuits needed for power up are supplied.
In the idle mode circuits are powered down and only sleep clock is run-
ning.
In the No Serve Power Save mode circuits are powered down, and only
sleep clock is running if no carrier is found during the scanning period.
The purpose of this mode is to reduce power consumption in the non–
network area.
In the active mode all the circuits are supplied with power although some
parts might be in the idle state part of the time.
The charge mode is effective in parallel with all previous modes. The
charge mode itself consists of two different states, i.e. the charge and the
maintenance mode.
The local mode is used for alignment and testing.
Original 08/98
Page 3 – 5
NSE–6
PAMS
System Module
Interconnection Diagram
Keyboard
module
UK8
6
SIM
2
Antenna
14
System/RF
Module
Technical Documentation
Display
9
4
Battery
Vibra
2
US8
2
Mic
2
IR Module
6
3 + 3
Charger
Earpiece
Page 3 – 6
Original 08/98
PAMS
NSE–6
Technical Documentation
System Module
System Module
External and Internal Connectors
Suppply Voltages and Power Consumption
Connector Line Symbol Minimum Typical /
Nominal
Charging VIN 7.1 8.4 9.3 V/ Travel charger,
Charging VIN 7.25 7.6 7.95 V/ Travel charger.
Charging I / VIN 720 800 850 mA/ Travel char-
Charging I / VIN 320 370 420 mA/ Travel char-
Maximum/
Peak
Unit / Notes
ACT–1
ACP–7
ger, ACT–1
ger, ACP–7
Battery contact signals
Pin Line
Symbol
1 BVOLT Battery voltage 3.0 3.6 5.3 V/ Maximum voltage in idle
2 BSI
3 BTEMP Input voltage
4 BGND 0 0 V
Parameter Mini-
mum
Input voltage 0 2.85 V/ Battery size indication
Battery indication
resistor
Input voltage
Output voltage
20 22 24 kohm/ service battery
27 51 kohm/ 4.1V Li battery
68 91 kohm/ 4.2V Li battery
0
2.1
1.9
Typical
/ Nomi-
nal
181% kohm/ Ni battery
Maxi-
mum
1.4
3
2.8
Unit / Notes
mode with a charger connected
Phone has 100k pull up resistor
SIM Card removal detection
V/ Battery temperature indication
V/ Phone power up (pulse)
V/ Battery power up (pulse)
Original 08/98
Page 3 – 7
NSE–6
PAMS
System Module
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 connector (includes jack and plates), headset connector and IR–link.
The System blocks provide the MCU, DSP and Logic control functions in
MAD ASIC, external memories, audio processing and RF control hardware in COBBA ASIC. Power supply circuitry CCONT ASIC delivers operating voltages both for the System and the RF blocks.
The RF block is designed for a handportable phone which operates in the
GSM system. The purpose of the RF block is to receive and demodulate
the radio frequency signal from the base station and to transmit a modulated RF signal to the base station. The SUMMA ASIC is used for VHF
and PLL functions. The CRFU ASIC is used at the front end.
Technical Documentation
Page 3 – 8
Original 08/98
PAMS
NSE–6
Technical Documentation
Baseband Module
Block Diagram
TX/RX SIGNALS
COBBA
UI
COBBA SUPPLY
RF SUPPLIES
CCONT
BB SUPPLY
PA SUPPLY
SIM
32kHz
CLK
SLEEP CLOCK
System Module
13MHz
SYSTEM CLOCK
CLK
BASEBAND
Technical Summary
The baseband module consists of four asics, CHAPS, CCONT, COBBA–
GJ and MAD2, which take care of the baseband functions of NSE–6.
The baseband is running from a 2.8V power rail, which is supplied by a
power controlling asic. In the CCONT asic there are 6 individually controlled regulator outputs for RF–section and two outputs for the baseband. In addition there is one +5V power supply output VCP for RF–part.
The CCONT contains also a SIM interface, which supports both 3V and
5V SIM–cards. 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 real time clock
running when the main battery is removed. The backup power supply is a
rechargable polyacene battery. The backup time with this battery is minimum of ten minutes.
MAD
+
MEMORIES
VBAT
BATTERY
CHAPS
DC–jack
Original 08/98
Page 3 – 9
NSE–6
PAMS
System Module
The interface between the baseband and the RF section is handled by a
specific asic. The COBBA 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 section. The COBBA supplies the analog TXC and AFC signals to rf section according to the MAD DSP digital control and converts
analog AGC into digital signal for the DSP. Data transmission between the
COBBA and the MAD is implemented using a parallel connection for high
speed signalling and a serial connection for PCM coded audio signals.
Digital speech processing is handled by the MAD asic. The COBBA asic
is a dual voltage circuit, the digital parts are running from the baseband
supply VBB and the analog parts are running from the analog supply
VCOBBA.
The baseband supports two external microphone inputs and two external
earphone outputs. The inputs can be taken from an internal microphone,
a headset microphone or from an signal source. The microphone signals
from different sources are connected to separate inputs at the COBBA
asic.
Technical Documentation
The output for the internal earphone is a dual ended type output capable
of driving a dynamic type speaker. Input and output signal source selection and gain control is performed inside the COBBA asic according to
control messages from the MAD. Keypad tones, DTMF, and other audio
tones are generated and encoded by the MAD and transmitted to the
COBBA for decoding. A buzzer alert and vibra control signals are generated by the MAD via UI–Switch.
Page 3 – 10
Original 08/98
PAMS
C
NSE–6
Technical Documentation
Charging Connector
Contact Line Symbol Function
DC–jack
side contact
(DC–plug ring)
DC–jack
center pin
DC–jack
side contact
(DC–plug jacket)
Pin Name Min Typ Max Unit Notes
2, b VIN
3, a L_GND 0 0 V Supply ground
L_GND Charger ground
VIN Charger input voltage
CHRG_CTRL Charger control output (from phone)
7.25
3.25
320
7.1
3.25
720
7.6
3.6
370
8.4
3.6
800
7.95
16.9
3.95
420
9.3
3.95
850
V
V
V
mA
V
V
mA
Unloaded ACP–7 Charger (5kohms
load)
Peak output voltage (5kohms load)
Loaded output voltage (10ohms load)
Supply current
Unloaded ACP–9 Charger
Loaded output voltage (10ohms load)
Supply current
System Module
4, c CHRG_
TRL
0 0.5 V Charger control PWM low
2.0 2.85 V Charger control PWM high
32 Hz PWM frequency for a fast charger
1 99 % PWM duty cycle
Headset Connector
Contact Line Symbol Function
2 XMIC Accessory microphone signal input (to phone)
1 SGND Accessory signal ground
3 XEAR Accessory earphone signal output (from phone)
Pin Name Min Typ Max Unit Notes
2 XMIC
2.0 2.2 kΩ Input AC impedance
1 Vpp Maximum signal level
100 600 µA Bias current
58 490 mV Maximum signal level
1 SGND
Original 08/98
10 µF Series output capacitance
0 Ω Resistance to phone ground
Page 3 – 11
NSE–6
Baud rate 9600 Bit/s
Baud rate 9.6k–230.4kBit/s
Baud rate 9.6k–230.4kBit/s
PAMS
System Module
Technical Documentation
NotesUnitMaxTypMinNamePin
3 XEAR
47 Ω Output AC impedance (ref. SGND)
10 µF Series output capacitance
16 150 300 Ω Load AC impedance to SGND (Head-
set)
1.0 Vpp Maximum output level (no load)
22 626 mV Output signal level
16 1500 Ω Load DC resistance to SGND (Head-
set)
2.8 V DC voltage (47k pull–up to VBB)
Service connections
Pin Name Min Typ Max Unit Notes
J124 MBUS 0 logic low
2.0 logic high 2.85
0.8 V Serial bidirectional control bus.
Phone has a 4k7 pullup resistor
J255 FBUS_RX 0 logic low
2.0 logic high 2.85
J256 FBUS_TX 0 logic low
2.0 logic high 2.85
0.8 V Fbus receive. Serial Data
Phone has a 220k pulldown resistor
0.5 V Fbus transmit. Serial Data
Phone has a 47k pullup resistor
J123 GND 0 0.3 V Supply ground
TOP
Phone from back sid
Battery pack lay
Battery connector
MBUS
FBUS RX
FBUS TX
GND
Page 3 – 12
Original 08/98
PAMS
5.0
Maximum voltage in call state with charger
NSE–6
Technical Documentation
Battery Connector
The electrical specifications for the battery connector is shown in
NO TAG. The BSI contact on the battery connector is used to detect when
the battery is to be removed to be able to shut down the operations of the
SIM card before the power is lost if the battery is removed with power on.
The BSI contact in the battery pack is 0.7mm shorter than the supply
power contacts to give enough time for the SIM shut down.
Pin Name Min Typ Max Unit Notes
4 BVOLT 3.0 3.6 4.5
5.3
3 BSI
0 2.85 V Battery size indication
181% kohm Battery indication resistor (Ni battery)
V Battery voltage
Maximum voltage in idle state with charger
Phone has 100kohm pull up resistor.
SIM Card removal detection
(Threshold is 2.4V@VBB=2.8V)
System Module
20 22 24 kohm Battery indication resistor (service battery)
27 51 kohm Battery indication resistor (4.1V Lithium bat-
tery)
68 91 kohm Battery indication resistor (4.2V Lithium bat-
tery)
2 BTEMP
1 BGND 0 0 V Battery ground
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
1.9
90 100
0 1 kohm Local mode initialization (in production)
3
20
2.85
200
V
ms
V
ms
Phone power up by battery (input)
Power up pulse width
Battery power up by phone (output)
Power up pulse width
Original 08/98
Page 3 – 13
NSE–6
PAMS
System Module
Technical Documentation
SIM Card Connector
Pin Name Parameter Min Typ Max Unit Notes
4 GND GND 0 0 V Ground
3, 5 VSIM 5V SIM Card
3V SIM Card
6 DATA 5V Vin/Vout
3V Vin/Vout
2 SIMRST 5V SIM Card
3V SIM Card
1 SIMCLK Frequency
Trise/Tfall
4.8
2.8
4.0
0
2.8
0
4.0
2.8
5.0
3.0
”1”
”0”
”1”
”0”
”1”
”1”
3.25
5.2
3.2
VSIM
0.5
VSIM
0.5
VSIM
VSIM
25
V Supply voltage
V SIM data
Trise/Tfall max 1us
V SIM reset
MHz
ns
SIM clock
Internal Microphone in Slide
Pin Name Min Typ Max Unit Notes
6 MICP 0.55 4.1 mV Connected to COBBA MIC2N input. The
maximum value corresponds to1 kHz, 0
dBmO network level with input amplifier
gain set to 32 dB. typical value is maximum value – 16 dB.
7 MICN 0.55 4.1 mV Connected to COBBA MIC2P input. The
maximum value corresponds to1 kHz, 0
dBmO network level with input amplifier
gain set to 32 dB. typical value is maximum value – 16 dB.
RTC Backup Battery
The RTC block in CCONT needs a power backup to keep the clock running when the phone battery is disconnected. The backup power is supplied from a rechargable polyacene battery that can keep the clock running minimum of 10 minutes. The backup battery is charged from the
main battery through CHAPS.
Signal Parameter Min Typ Max Unit Notes
VBACK
VBACK
Page 3 – 14
Backup battery charging from CHAPS
Backup battery charging from CHAPS
Backup battery supply
to CCONT
Backup battery supply
to CCONT
3.02 3.15 3.28 V
100 200 500 uA Vout@VBAT–0.2V
2 3.28 V Battery capacity
65uAh
80 uA
Original 08/98
PAMS
NSE–6
Technical Documentation
Buzzer
Signal Maximum
output cur-
rent
BuzzPWM /
BUZZER
2mA 2.5V 0.2V 0...50 (128 lin-
Input
high level
Input
low level
System Module
Level (PWM)
range, %
ear steps)
Frequency
range, Hz
440...4700
Original 08/98
Page 3 – 15
NSE–6
PAMS
System Module
Functional Description
Power Distribution
In normal operation the baseband is powered from the phone‘s battery.
The battery consists of three Nickel Metal Hydride cells. There is also a
possibility to use batteries consisting of one Lithium–Ion cell. An external
charger can be used for recharging the battery and supplying power to
the phone. The charger can be either a standard charger that can deliver
around 400 mA or so called performance charger, which can deliver supply current up to 850 mA.
The baseband contains components that control power distribution to
whole phone excluding those parts that use continuous battery supply.
The battery feeds power directly to following parts of the system: CCONT,
power amplifier, and UI (buzzer, display, keyboard lights, IR and vibra).
Figure below shows a block diagram of the power distribution.
Technical Documentation
The power management circuit CHAPS provides protection agains overvoltages, charger failures and pirate chargers etc. that would otherwise
cause damage to the phone.
PA SUPPLY
VCOBBA
COBBA
UI
VBAT
VBB
VBB
MAD
+
MEMORIES
RF SUPPLIES
CCONT
PWRONX
CNTVR
VBB
PURX
PWM
LIM
CHAPS
VSIM
VBAT
RTC
BACKUP
SIM
BATTERY
Page 3 – 16
BASEBAND
VIN
DC–jack
Original 08/98
PAMS
NSE–6
Technical Documentation
Battery charging
The electrical specifications give the idle voltages produced by the acceptable chargers at the DC connector input. The absolute maximum input voltage is 30V due to the transient suppressor that is protecting the
charger input. At phone end there is no difference between a plug–in
charger or a desktop charger. The DC–jack pins and bottom connector
charging pads are connected together inside the phone.
MAD
0R22
VBAT
MAD
CCONTINT
CCONT
ICHAR
PWM_OUT
VCHAR
GND
LIM
VOUT
CHAPS
RSENSE
PWM
22k
VCH
GND
1n
TRANSCEIVER
1u
47k
4k7
30V
1.5A
System Module
VIN
CHRG_CTRL
L_GND
CHARGER
NOT IN
ACP–7
Startup Charging
When a charger is connected, the CHAPS is supplying a startup current
minimum of 130mA to the phone. The startup current provides initial
charging to a phone with an empty battery. Startup circuit charges the
battery until the battery voltage level is reaches 3.0V (+/– 0.1V) and the
CCONT releases the PURX reset signal and program execution starts.
Charging mode is changed from startup charging to PWM charging that is
controlled by the MCU software. If the battery voltage reaches 3.55V
(3.75V maximum) before the program has taken control over the charging, the startup current is switched off. The startup current is switched on
again when the battery voltage is sunken 100mV (nominal).
Parameter Symbol Min Typ Max Unit
VOUT Start– up mode cutoff limit Vstart 3.45 3.55 3.75 V
VOUT Start– up mode hysteresis
NOTE: Cout = 4.7 uF
Start–up regulator output current
VOUT = 0V ... Vstart
Vstarthys 80 100 200 mV
Istart 130 165 200 mA
Original 08/98
Page 3 – 17
NSE–6
PAMS
System Module
Battery Overvoltage Protection
Output overvoltage protection is used to protect phone from damage.
This function is also used to define the protection cutoff voltage for different battery types (Li or Ni). The power switch is immediately turned OFF if
the voltage in VOUT rises above the selected limit VLIM1 or VLIM2.
Parameter Symbol LIM input Min Typ Max Unit
Output voltage cutoff limit
(during transmission or Li–
battery)
Output voltage cutoff limit
(no transmission or Ni–bat-
tery)
VLIM1 LOW 4.4 4.6 4.8 V
VLIM2 HIGH 4.8 5.0 5.2 V
The voltage limit (VLIM1 or VLIM2) is selected by logic LOW or logic
HIGH on the CHAPS (N101) LIM– input pin. Default value is lower limit
VLIM1.
Technical Documentation
VCH
VCH<VOUT
VOUT
VLIM1 or VLIM2
When the switch in output overvoltage situation has once turned OFF, it
stays OFF until the the battery voltage falls below VLIM1 (or VLIM2) and
PWM = LOW is detected. The switch can be turned on again by setting
PWM = HIGH.
t
t
SWITCH
PWM (32Hz)
Page 3 – 18
ON OFF
ON
Original 08/98
PAMS
NSE–6
Technical Documentation
Battery Removal During Charging
Output overvoltage protection is also needed in case the main battery is
removed when charger connected or charger is connected before the battery is connected to the phone.
With a charger connected, if VOUT exceeds VLIM1 (or VLIM2), CHAPS
turns switch OFF until the charger input has sunken below Vpor (nominal
3.0V, maximum 3.4V). MCU software will stop the charging (turn off
PWM) when it detects that battery has been removed. The CHAPS remains in protection state as long as PWM stays HIGH after the output
overvoltage situation has occured.
VCH
(Standard
Charger)
VOUT
Vpor
VLIM
4V
Vstart
Drop depends on load
& C in phone
System Module
Istart off due to VCH<Vpor
Vstarthys
PWM
SWITCH
1.1Battery removed, (standard) charger connected, VOUT rises (follows charger voltage)
2. VOUT exceeds limit VLIM(X), switch is turned immediately OFF
3.3VOUT falls (because no battery) , also VCH<Vpor (standard chargers full–rectified
4. Software sets PWM = LOW –> CHAPS does not enter PWM mode
5. PWM low –> Startup mode, startup current flows until Vstart limit reached
6. VOUT exceeds limit Vstart, Istart is turned off
7. VCH falls below Vpor
”1”
”0”
ON
OFF
2
output). When VCH > Vpor and VOUT < VLIM(X) –> switch turned on again (also PWM
is still HIGH) and VOUT again exceeds VLIM(X).
5
4
6
7
t
t
t
Original 08/98
Page 3 – 19
NSE–6
PAMS
System Module
Different PWM Frequencies ( 1Hz and 32 Hz)
When a travel charger (2– wire charger) is used, the power switch is
turned ON and OFF by the PWM input when the PWM rate is 1Hz. When
PWM is HIGH, the switch is ON and the output current Iout = charger current – CHAPS supply current. When PWM is LOW, the switch is OFF and
the output current Iout = 0. To prevent the switching transients inducing
noise in audio circuitry of the phone soft switching is used.
The performance travel charger (3– wire charger) is controlled with PWM
at a frequency of 32Hz. When the PWM rate is 32Hz CHAPS keeps the
power switch continuously in the ON state.
SWITCH
ON ONON OFF OFF
Technical Documentation
PWM (1Hz)
SWITCH
PWM (32Hz)
ON
Page 3 – 20
Original 08/98
PAMS
NSE–6
Technical Documentation
Battery Identification
Different battery types are identified by a pulldown resistor inside the battery pack. The BSI line inside transceiver has a 100k pullup to VBB. The
MCU can identify the battery by reading the BSI line DC–voltage level
with a CCONT (N100) A/D–converter.
BATTERY
BVOLT
BTEMP
BSI
VBB
2.8V
100k
10k
System Module
TRANSCEIVER
BSI
CCONT
The battery identification line is used also for battery removal detection.
The BSI line is connected to a SIMCardDetX line of MAD2 (D200). SIMCardDetX is a threshold detector with a nominal input switching level
0.85xVcc for a rising edge and 0.55xVcc for a falling edge. The battery
removal detection is used as a trigger to power down the SIM card before
the power is lost. The BSI contact in the battery pack is made 0.7mm
shorter than the supply voltage contacts so that there is a delay between
battery removal detection and supply power off.
Vcc
0.850.05 Vcc
0.550.05 Vcc
R
s
BGND
10n
SIMCardDetX
MAD
GND
Original 08/98
SIMCARDDETX
S
IGOUT
Page 3 – 21
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