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2112
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Schema
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Table of contents
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Nokia 2112, rh57 System Module

Nokia Customer Care
2112 (RH-57) Series Transceivers

System Module

Issue 1 07/2004 Company Confidential ©2004 Nokia Corporation
2112 (RH-57) System Module Nokia Customer Care

Contents Page

Baseband Module ........................................................................................................................................ 3
UEM .............................................................................................................................................................. 4
BB-RF Interface Connections ...................................................................................................................6
UPP................................................................................................................................................................ 9
NOR Flash Memory and SRAM .......................................................................................................... 10
User Interface Hardware .........................................................................................................................10
LCD............................................................................................................................................................. 10
Keyboard................................................................................................................................................... 11
Power Key ................................................................................................................................................ 11
Lights......................................................................................................................................................... 11
Flashlight.................................................................................................................................................. 11
Vibra .......................................................................................................................................................... 11
Audio Hardware .........................................................................................................................................12
Earpiece .................................................................................................................................................... 12
Microphone ............................................................................................................................................. 12
MIDI Speaker........................................................................................................................................... 12
Audio Amplifier Interface.................................................................................................................... 12
Battery ..........................................................................................................................................................12
Battery Connector ................................................................................................................................. 13
Accessories Interface ................................................................................................................................14
System Connector.................................................................................................................................. 14
Charger IF................................................................................................................................................. 16
Test Interfaces ............................................................................................................................................16
Production Test Pattern ....................................................................................................................... 16
General Information About Testing ......................................................................................................19
Phone Operating Modes ...................................................................................................................... 19
RF Module ....................................................................................................................................................19
Requirements .......................................................................................................................................... 19
Antenna .................................................................................................................................................... 19
Transmitter .............................................................................................................................................. 20
Synthesizer .............................................................................................................................................. 22
Receiver ................................................................................................................................................... 24
Page 2 ©2004 Nokia Corporation Company Confidential Issue 1 07/2004
2112 (RH-57)
Nokia Customer Care System Module

Introduction

The 2112 is available as a CDMA single-band engine (800 MHz CDMA). There are several different operational modes, which have different states controlled by the cellular SW. Some examples include:
• Idle State (on ACCH)
• Camping (on DCCH)
• Scanning
•Conversation
• No Service Power Save (NSPS)
In the power-off mode, only the circuits needed for power-up are supplied.
In the idle mode, circuits are powered down and only the sleep clock is running.
In the active mode, all the circuits are supplied with power, although some parts might be in 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, the fast charge and the maintenance mode.
The Local Mode is used for alignment and testing.

Baseband Module

The baseband module is an 800 MHz CDMA DCT4 transceiver based on the DCT4 Apollo engine. The baseband consists of three ASICs:
• Universal Energy Management (UEM)
• Universal Phone Processor (UPP)
• 64-megabit FLASH
Issue 1 07/2004 ©2004 Nokia Corporation Company Confidential Page 3
2112 (RH-57) System Module Nokia Customer Care
PA Supply
RF Supplies
Apollo
BATTERY
RF RX/TX
RFIC CTRL 19.2 MHz
UEM
Ear
MIC
Buzzer
Vibra
MEMADDA MEMCONT
FLASH
UPP
PURX
RF RX/TX
Sleep Clock 32 kHz
CBUS/DBUS
AUDIO
BB Supplies
UEM
External Audio
Charger
Connection
DCT4 System
Connector
Figure 1: Baseband module diagram
The UEM is the Universal Energy Management IC for DCT4 digital handportable phones. In addition to energy management, it performs all the baseband mixed-signal functions.
Most UEM pins have 2kV ESD protection. Those signals that are considered to be exposed more easily to ESD have 8kV protection inside the UEM. Such signals are all audio, headset, BSI, Btemp, Fbus, and Mbus signals.
The baseband is powered from five different UEM regulators.
Table 1: Baseband Regulators
Regulator
Maximum Current (mA)
Vout (V) Notes
VCORE 300 1.57/1.35 Power up default 1.57V and 1.35 in Sleep Mode.
VIO 150 1.8 Enabled always except during power-off mode
VFLASH1 70 2.78 Enabled always except during power-off mode
Page 4 ©2004 Nokia Corporation Company Confidential Issue 1 07/2004
2112 (RH-57)
Nokia Customer Care System Module
Table 1: Baseband Regulators (Continued)
Regulator
VFLASH2 40 2.78 Enabled only when data cable is connected
VANA 80 2.78 Enabled only when the system is awake (Off
VSIM 25 3.0 Enabled only when SIM card is used
Maximum Current (mA)
Vout (V) Notes
during sleep and power off-modes)
Table 2 includes the UEM regulators for the RF.
Table 2: RF Regulators
Regulator
VR1A 10 4.75 Enabled when cell transmitter is on
VR1B 10 4.75 Enabled when the transmitter is on
VR2 100 2.78 Enabled when the transmitter is on
VR3 20 2.78 Enabled when SleepX is high
VR4 50 2.78 Enabled when the receiver is on
Maximum Current (mA)
Vout (V) Notes
VR5 50 2.78 Enabled when the receiver is on
VR6 50 2.78 Enabled when the transmitter is on
VR7 45 2.78 Enabled when the receiver is on
The charge pump that is used by VR1A is constructed around the UEM. The charge pump works with the Cbus (1.2 MHz) oscillator and gives a 4.75 V regulated output voltage to the RF.
RF Interface
In addition to the RF regulators mentioned, the UEM handles the interface between the baseband and the RF section. It 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 UEM supplies the analog AFC signal to the RF section according to the UPP DSP digital control. It also converts the PA temperature into real data for the DSP. The UPP controls the RFIC through the 3-wire RFIC bus. In addition, the UPP provides a PDM regulator for RF interface (RX/TX AGC control).
Charging Control
The CHACON block of the UEM controls charging. Needed functions for charging controls are the PWM-controlled battery charging switch, charger-monitoring circuitry, battery voltage monitoring circuitry, and RTC supply circuitry for backup battery charging. In
Issue 1 07/2004 ©2004 Nokia Corporation Company Confidential Page 5
2112 (RH-57) System Module Nokia Customer Care
addition, external components are needed for EMC protection of the charger input to the baseband module. The DCT4 baseband is designed to electrically support both DCT3 and DCT4 chargers.
Digital Interface
Data transmission between the UEM and the UPP is implemented using two serial connections: DBUS (9.6 MHz) for the DSP and CBUS (1.2 MHz in CDMA) for the MCU. The UEM is a dual-voltage circuit. The digital parts run from 1.8 V and the analog parts run from 2.78 V. The Vbat (3.6 V) voltage regulator inputs are also used.
Audio Codec
The baseband supports two external microphone inputs and one external earphone output. The inputs can be taken from an internal microphone, from a headset microphone, or from an external microphone signal source through a headset connector. The output for the internal earpiece is a dual-ended output, and the differential output is capable of driving 4Vpp to the earpiece with a 60 dB minimum signal to total distortion ratio. Input and output signal source selection and gain control is performed inside the UEM ASIC according to control messages from the UPP. Both the buzzer and external vibra alert control signals are generated by the UEM with separate PWM outputs.
MIDI
The MIDI audio signal generated by the DSP and UEM audio CoDec is routed to the XEAR output of the UEM. An audio amplifier (LM4890) is used to boost enough power for the speaker.
UI Drivers
The vibra, display LED, and keyboard LEDs are driven by open collector output drivers inside the UEM. These drivers can generate PWM square wave signals to these devices.
AD Converters
There is an 11-channel analog-to-digital converter in the UEM. The AD converters are calibrated in the production line.

BB-RF Interface Connections

All the signal descriptions and properties in the following tables are valid only for active signals.
Signal Name
From To Parameter Min Type Max Unit Function
Table 3: PDM Interface
RX_IF_AGC UPP
GenIO 9
Yoda Voltage Min
Max
-------------­Clk Rate
(1)
0.0
1.75
------
1.8
----
9.6
0.1
1.86
-----
19.2
V
----­MHz
Controls gain of VGA r in receiver
Page 6 ©2004 Nokia Corporation Company Confidential Issue 1 07/2004
2112 (RH-57)
Nokia Customer Care System Module
Table 3: PDM Interface (Continued)
Signal Name
TX_IF_AGC UPP
TX_RF_AGC UPP
Signal Name
TX_Gate UPP
From To Parameter Min Type Max Unit Function
GenIO 7
GenIO 26
From To Parameter
Gen IO 8 pullup
Jedi Voltage Min
Max
-------------­Clk Rate
Jedi Voltage Min
Max
-------------­Clk Rate
Jedi and PA Gating Transistors
(1)
(3)
Table 4: General I/O Interface
“0” Transmitter Off “1” Transmitter On Timing Accuracy
0.0
1.75
-----
0.0
1.75
------
0.1
1.8
-----
9.6
1.8
-----
9.6
1.86
-----
19.2
0.1
1.86
------
19.2
Input Characteristics
1.38 1.88 V 0 0.4 V 4 chips, and can be up to a total of 255 chips
V
----­MHz
V
----­MHz
Controls gain of VGA in IF VGA
Controls gain of TX driver
Function
Punctures the PAs and the Jedi ASIC
Digital Into RF
D0 UPP
Gen IO 10
D1 UPP
Gen IO 13
D2 UPP
Gen IO 12
Signal Name
19.2M_UPP Yoda UPP Frequency
AFC UEM VCT
From To Parameter Min Type Max Unit Function
PMIC Voltage Min
PMIC Voltage Min
PMIC Voltage Min
-------------­Signal amplitude
Voltage Min
CXO
Max
--------------­Settling time
0.4V max
Max
Max
Max
Table 5: VCTCXO Interface
-----
0.5
0.0
2.4
------ -----
(4)
1.72V-1.86V
0.4V max
1.72V-1.86V
0.4V max
1.72V-1.86V
19.2
-----
1.0
--
-----
1.5
0.1
2.55
-----
0.2
Enable PMIC
Set PMIC output voltage
Set PMIC output voltage
MHz
----­Vpp
V
----­ms
High stability clock signal for logic circuits, AC coupled sinewave.
Automatic frequency control signal for VCTCXO Digital Into RF
Issue 1 07/2004 ©2004 Nokia Corporation Company Confidential Page 7
2112 (RH-57) System Module Nokia Customer Care
Table 6: Regulated Supplies from UEM to RF
Signal Name
VBAT Battery PA &
VR1A UEM PA Vref Voltage
VR2 UEM Jedi Voltage
VR3 UEM VCTCXO,
VR4 UEM Alfred Voltage
VR5 UEM Jedi Voltage
From To Parameter Min Type Max Unit Function
Voltage UEM, external driver amps
Yoda
-------------
Current
-------------
Current
-------------
Current
Voltage
-------------
Current
-------------
Current
-------------
Current
3.2
----­0
4.6
----­0
2.70
-----
2.70
-----
2.70
-----
2.70
-----
3.5
-----
-
4.75
----­4
2.78
-----
2.78
-----
2.78
-----
2.78
-----
5.1
----­2A peak
4.9
----­5
2.86
----­100
2.8
----­20
V
-----
V
----­mA
V
----­mA
V
----­mA
V
----­mA
V
----­mA
Battery supply. Lower limit is to guarantee regulator PSRR
Charge pump + lin­ear regulator.
Linear regulator
Low noise linear reg­ulator for VCTCXO
Low lq linear regulator
Low lq linear regulator
VR6 UEM Yoda Voltage
-------------
Current
VR7 UEM Jedi Voltage
-------------
Current
VIO UEM Jedi,
Yoda
Vref_rf01 UEM Yoda Voltage 1.334 1.35 1.366 V Voltage refer for Yoda
Signal Name
PA_TEMP Thermistor UEM Input voltage
PWROUT Jedi UEM Input voltage
From To Parameter Min Type Max Unit Function
Voltage 1.70 1.8 1.88
Table 7: Slow A/D Converters
range
range
2.70
------
2.70
------
0 2.78 V PA temperature sen-
0 2.78 V Buffered output of TX
2.78
-----
2.78
-----
-----­50
V
----­mA
V
----­mA
V
----­mA
Low lq linear regulator
Low noise linear reg­ulator for synthesizer
Supply for RF-BB dig­ital signal interface and some digital parts of RF
I/or de-modulator
sor output voltage Analog Out of RF
output detector
Page 8 ©2004 Nokia Corporation Company Confidential Issue 1 07/2004
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