Nokia RH-66 Operating instructions

Nokia Customer Care
2115i/2116/2116i (RH-66)
Mobile Terminals
Issue 1 03/2005 Company Confidential ©2005 Nokia Corporation
Baseband Description and
Troubleshooting

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Page 2 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Contents Page
Introduction ..................................................................................................................................................... 5
Baseband and RF Architecture ................................................................................................................6
Power Up and Reset ....................................................................................................................................7
Power Up ........................................................................................................................................................9
Power Key ................................................................................................................................................... 9
Charger ........................................................................................................................................................ 9
RTC Alarm ................................................................................................................................................ 10
Power Off .....................................................................................................................................................10
Power Consumption and Operation Modes .......................................................................................10
Power-off Mode..................................................................................................................................... 10
Sleep Mode.............................................................................................................................................. 10
Active Mode ............................................................................................................................................ 11
Charging Mode....................................................................................................................................... 11
Power Distribution ....................................................................................................................................11
Clock Distribution ......................................................................................................................................13
RFClk (19.2 MHz Analog)..................................................................................................................... 13
RFConvClk (19.2 MHz digital) ............................................................................................................ 14
CBUS Clk Interface ................................................................................................................................ 15
DBUS Clk Interface................................................................................................................................ 15
SleepCLK (Digital) .................................................................................................................................. 16
SleepCLK (Analog).................................................................................................................................. 16
Flash Programming Error Codes .............................................................................................................. 17
Charging Operation..................................................................................................................................... 19
Battery ..........................................................................................................................................................19
Charging Circuitry .....................................................................................................................................19
Charger Detection .....................................................................................................................................20
Charge Control ...........................................................................................................................................21
Audio .............................................................................................................................................................21
Display and Keyboard ...............................................................................................................................22
Flashlight.................................................................................................................................................. 22
Accessories ..................................................................................................................................................23
Charging................................................................................................................................................... 23
Pop-port Headset Detection............................................................................................................... 25
FBUS Detection....................................................................................................................................... 26
Accessory Detection Through ACI..................................................................................................... 26
SIM CAR .......................................................................................................................................................28
GPS Module................................................................................................................................................... 29
Test Points - Bottom................................................................................................................................... 31
Test Points - Top .......................................................................................................................................... 34
Troubleshooting............................................................................................................................................ 36
Mobile Terminal is Dead ..........................................................................................................................37
Flash Faults .................................................................................................................................................38
Power Does Not Stay on or the Mobile Terminal is Jammed ........................................................40
Charger Faults ............................................................................................................................................42
Audio Faults ................................................................................................................................................43
Display Faults ..............................................................................................................................................47
Keypad Faults .............................................................................................................................................49

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 3
Flashlight Faults .........................................................................................................................................51
GPS Faults ....................................................................................................................................................52

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting Nokia Customer Care
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Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 5
Introduction
The mobile terminal uses a CDMA tri-mode engine (AMPS/800/1900) with a DCT4
baseband consisting of three ASICs:
• Universal Energy Management cost reduction (UEMC)
• Universal Phone Processor (UPP) - UPP8Mv4.2
• 8MB flash memory with 1 MB of RAM memory
The baseband architecture supports a power-saving function called sleep mode. Sleep
mode shuts off the voltage-controlled temperature-compensated crystal oscillator
(VCTCXO), which is used as the system clock source for both the RF and the baseband.
During sleep mode, the system runs from a 32 kHz crystal and all the RF regulators
(VR1A, VR1B, VR2—VR7) are off. The sleep time is determined by network parameters.
Sleep mode is entered when both the Master Control Unit (MCU) and the Digital Signal
Processor (DSP) are in standby mode and the normal VCTCXO clock is switched off. The
mobile terminal is awakened by a timer running from this 32 kHz clock supply. The period
of the sleep/wake up cycle (slotted cycle) is 1.28N seconds, where N= 0, 1, 2, depending
on the slot cycle index.
The mobile terminal supports standard Nokia 2-wire and 3-wire chargers (ACP-x and
LCH-x). However, the 3-wire chargers are treated as 2-wire chargers. The PWM control
signal for controlling the 3-wire charger is ignored. The UEMC and energy management
software control charging.
A BL-6C (1070 mAh) lithium-ion battery is used as the main power source.

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
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Baseband and RF Architecture
Figure 1: Power distribution
Bottom
Conn.
Flash
N7000 N7100
Core
UPP
Charger
Battery
DC/DC
LCD/Key
VCTCXO
19.2 MHz
Sleep Clk
32 KHz
CBus
DBus
MBus
ExtBus
C
FBus
MBus
RF
Bus
VBatt
VIO
Vflash1
Vflash2
VR2
UEMC
VR1B
VR6
VR5
VR1A
VR4
VR3
VR7
VPPPRODTP
VANA
PA
VBatt
Front
End UHF
SYNTH
FBusRx
FBusT
x
GenIO
Control
V SIM
SIM Reader
V Bat
System
Connector
V Bat
Audio
N7160
JTAG
Dlight
Klight
Flashlight

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 7
Power Up and Reset
The UEMC ASIC controls the power up and reset. The baseband can power up in the
following ways:
• Pressing the Power button, which means grounding the PWRONX pin of the
UEMC
• Connecting the charger to the charger input
• Initiating the real-time clock (RTC) alarm (when the RTC logic has been
programmed to give an alarm)
After receiving one of the above signals, the UEMC counts a 20 ms delay and then enters
reset mode. The watchdog starts, and if the battery voltage is greater than Vcoff+, a
200 ms delay starts to allow references (etc.) to settle. After this delay elapses, the
VFLASH1 regulator enables. Then, 500 us later, the VR3, VANA, VIO, and VCORE enable.
The Power Up Reset (PURX) line holds low for 20 ms and is sent to the UPP. Resets are
generated for the MCU and the DSP. During this reset phase, the UEMC forces the
VCTCXO regulator on regardless of the status of the sleep control input signal to the
UEMC.
The FLSRSTx from the UPP is used to reset the flash during power up and to put the flash
in power down during sleep mode. All baseband regulators are switched on when the
UEMC is powered on. The UEMC internal watchdogs run during the UEMC reset state,
with the longest watchdog time selected. If the watchdog expires, the UEMC returns to
the power-off state. The UEMC watchdogs are internally acknowledged at the rising
edge of the PURX signal to always give the same watchdog response time to the MCU.
Figure 2 and Figure 3 represent the UEMC start-up sequence from reset to power-on
mode.

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Page 8 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Figure 2: Power-on sequence and timing

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 9
Figure 3: Measured power-on sequence and timing
Power Up
The mobile terminal can power up using the power key, a charger, or an RTC alarm.
Power Key
When the power key is pressed, the UEMC enters the power-up sequence. Pressing the
power key causes the PWRONX pin on the UEMC to ground. The UEMC PWRONX signal is
not part of the keypad matrix. The power key is only connected to the UEMC. This means
that when pressing the power key an interrupt is generated to the UPP that starts the
MCU. The MCU then reads the UEMC interrupt register and notices that it is a PWRONX
interrupt. The MCU reads the status of the PWRONX signal using the UEMC control bus
(CBUS). If the PWRONX signal stays low for a certain time the MCU accepts this as a
valid power-on state and continues with the software baseband initialization. If the
power key does not indicate a valid power-on situation, the MCU powers off the
baseband.
Charger
Charging is controlled by start-up charging circuitry in order to detect and start charging
in cases where the main battery is empty and the UEMC has no supply (NO_SUPPLY or
BACKUP mode).

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Baseband Description and Troubleshooting
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Charging is controlled by START_UP charge circuitry when it detects the VBAT level to be
below the master reset threshold (VMSTR-). Connecting a charger forces the VCHAR input
to rise above the charger detection threshold (VCHDET+), and by detection start-up
charging initiates. The UEMC generates 100 mA of constant output current from the
connected charger’s output voltage. The battery’s voltage rises at it charges, and when
the VBAT voltage level is detected to be higher than the master reset threshold limit
(VMSTR+), the START_UP charge is terminated.
The charge control (CHACON) monitors the VBAT voltage level. A MSTRX=‘1’ output reset
signal (internal to the UEMC) is given to the UEMC’s reset block when the VBAT is
greater than the VMSTR+ and the UEMC enters into the reset sequence.
If the VBAT is detected to fall below VMSTR during start-up charging, charging is
cancelled. Charging restarts if a new rising edge on the VCHAR input is detected (VCHAR
rising above VCHDET+).
RTC Alarm
If the mobile terminal is in power-off mode when the RTC alarm begins, the wake-up
procedure occurs. After the baseband is powered on, an interrupt is given to the MCU.
When an RTC alarm occurs during active mode, the interrupt is generated to the MCU.
Power Off
The baseband switches to power-off mode if any of following occurs:
• Power key is pressed
• Battery voltage is too low (VBATT < 3.2 V)
• Watchdog timer register expires
The UEMC controls the power-down procedure.
Power Consumption and Operation Modes
Power-off Mode
In power-off mode, power (VBAT) is supplied to the UEMC, vibra, LED, PA, and PA drivers.
During this mode, the current consumption is approximately 35 uA.
Sleep Mode
In sleep mode, both processors (MCU and DSP) are in stand-by. The mobile terminal
enters sleep mode only when both processors make the request. When the UEMC detects
as low SLEEPX signal, the mobile terminal enters sleep mode. The VIO and VFLASH1
regulators are put into low quiescent current mode, VCORE enters LDO mode, and the
VANA and VFLASH2 regulators are disabled. All RF regulators are disabled during sleep
mode. When the SLEEPX signal is detected high by the UEMC, the mobile terminal enters
active mode and all functions are activated.

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 11
Sleep mode is exited either by the expiration of a sleep clock counter in the UEMC or by
some external interrupt (generated by a charger connection, key press, headset
connection, etc.). The VCTCXO is shut down in sleep mode and the 32 kHz sleep clock
oscillator is used as a reference clock for the baseband.
Active Mode
In active mode, the mobile terminal operates normally by scanning for channels,
listening to a base station, and transmitting and processing information. There are
several sub-states in the active mode depending on the mobile terminal present state of
the mobile terminal, such as burst reception, burst transmission etc.
In active mode, software controls the UEMC RF regulators: VR1A and VR1B can be
enabled or disabled. VSIM can be enabled or disabled and its output voltage can be
programmed to be 1.8 V or 3.3 V. VR2 and VR4—VR7 can be enabled or disabled or forced
into low quiescent current mode. VR3 is always enabled in active mode and disabled
during sleep mode and cannot be controlled by software in the same way as the other
regulators. VR3 only turns off if both processors request to be in sleep mode.
Charging Mode
Charging mode can function in parallel with any other operating mode. A BSI resistor
inside the battery pack indicates the battery type/size. The resistor value corresponds to
a specific battery capacity. The UEMC measures the battery voltage, temperature, size,
and charging current.
CHACON inside the UEMC controls the charging current delivered from the charger to
the battery and mobile terminal. The battery voltage rise is limited by turning the UEMC
switch off when the battery voltage has reached 4.2 V. The charging current is monitored
by measuring the voltage drop across a 220 mOhm resistor.
Power Distribution
In normal operation, the baseband is powered from the mobile terminal‘s battery. The
battery consists of one lithium-ion cell capacity of 1070 mAh and some safety and
protection circuits.
The UEMC ASIC controls the power distribution to the whole mobile terminal through
the baseband and RF regulators excluding the power amplifier (PA), which has a
continuous power rail directly from the battery. The battery feeds power directly to the
following parts of the system:
•UEMC
•PA
•Vibra
•Display
• Keyboard lights

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
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The heart of the power distribution is the power control block inside the UEMC. It
includes all the voltage regulators and feeds the power to the entire system. The UEMC
handles hardware power-up functions so the regulators are not powered and the power
up reset (PURX) is not released if the battery voltage is less than 3 V.
The baseband is powered from the following UEMC regulators:
Table 2 includes the UEMC regulators for the RF.
The charge pump that is used by VR1A is constructed around the UEMC. The charge
pump works with the CBUS oscillator (1.2 MHz) and gives a 4.75 V regulated output
voltage to the RF.
Table 1: Baseband Regulators
Regulator Maximum
Current (mA) Vout (V) Notes
VCORE 300 1.35/1.05 Power up default 1.35V and 1.05V 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
VFLASH2 40 2.78 Enabled only when data cable is connected
VANA 80 2.78 Enabled only when the system is awake (Off
during sleep and power-off modes)
VSIM 25 3.0 Enabled only when SIM card is used
Table 2: RF Regulators
Regulator Maximum
Current (mA) Vout (V) Notes
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
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

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 13
Clock Distribution
RFClk (19.2 MHz Analog)
The main clock signal for the baseband is generated from the voltage and temperature
controlled crystal oscillator (VCTCXO) and sent to the UPP at pin M5.
Figure 4: Waveform of the 19.2 MHz clock (VCTCXO) going to the UPP

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Baseband Description and Troubleshooting
Page 14 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
RFConvClk (19.2 MHz digital)
The UPP distributes the 19.2 MHz internal clock to the DSP and MCU, where the software
multiplies this clock by seven for the DSP and by two for the MCU.
Figure 5: RFCovCLk waveform

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 15
CBUS Clk Interface
A 1.2 MHz clock signal is used for CBUS, which is used by the MCU to transfer data
between the UEMC and the UPP.
Figure 6: CBUS data transfer
DBUS Clk Interface
A 9.6 MHz clock signal is used for DBUS, which is used by the DSP to transfer data
between the UEMC and UPP.
Figure 7: DBUS data transferring
The system clock is stopped during sleep mode by disabling the VCTCXO power supply
(VR3) from the UEMC regulator output by turning off the controlled output signal SleepX
from the UPP.

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Page 16 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
SleepCLK (Digital)
The 32 kHz sleep clock in the UEMC is also used in the UPP for sleep mode timing.
Figure 8: 32 kHz Digital output from UEMC
SleepCLK (Analog)
When the system enters sleep mode or power off mode, the external 32 KHz crystal
provides a reference to the UEMC RTC circuit to turn on the mobile terminal during
power-off or sleep mode.
Figure 9: 32 kHz analog waveform at the 32 KHz crystal input

Nokia Customer Care Baseband Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 17
Flash Programming Error Codes
The following characteristics apply to the information in Table 3.
• Error codes can be seen from the test results or from Phoenix's flash-tool.
• Underlined information means that the connection under consideration is being
used for the first time.
Table 3: Flash Programming Error Codes
Error Description Not Working Properly
C101 "The Phone does not set FbusTx line high after
the startup."
Vflash1
VBatt
BSI and FbusRX from prommer to UEMC.
FbusTx from UPP->UEMC->Prommer(SA0)
C102 "The Phone does not set FbusTx line low after
the line has been high. The Prommer generates
this error also when the Phone is not con-
nected to the Prommer."
PURX(also to Safari)
VR3
Rfclock(VCTCXO->Safari->UPP)
Mbus from Prommer->UEMC-
>UPP(MbusRx)(SA0)
FbusTx from UPP->UEMC->Prommer(SA1)
BSI and FbusRX from prommer to UEMC.
C103 " Boot serial line fail." Mbus from Prommer->UEMC-
>UPP(MbusRx)(SA1)
FbusRx from Prommer->UEMC->UPP
FbusTx from UPP->UEMC->Prommer
C104 "MCU ID message sending failed in the Phone." FbusTx from UPP->UEMC->Prommer
C105 "The Phone has not received Secondary boot
codes length bytes correctly."
Mbus from Prommer->UEMC->UPP(MbusRx)
FbusRx from Prommer->UEMC->UPP
FbusTx from UPP->UEMC->Prommer
C106 "The Phone has not received Secondary code
bytes correctly."
Mbus from Prommer->UEMC->UPP(MbusRx)
FbusRx from Prommer->UEMC->UPP
FbusTx from UPP->UEMC->Prommer
C107 "The Phone MCU can not start Secondary code
correctly."
UPP
C586 "The erasing status response from the Phone
informs about fail."
Flash
C686 "The programming status response from the
Phone informs about fail."
Flash
Cx81 "The Prommer has detected a checksum error
in the message, which it has received from the
Phone."
FbusTx from UPP->UEMC->Prommer
Cx82 "The Prommer has detected a wrong ID byte in
the message, which it has received from the
Phone."
FbusTx from UPP->UEMC->Prommer

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Page 18 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
A204
Cx83
Cx84
Cx85
"The flash manufacturer and device IDs in the
existing algorithm files do not match with the
IDs received from the target phone."
"The Prommer has not received phone
acknowledge to the message."
"The phone has generated NAK signal during
data block transfer."
"Data block handling timeout"
Flash
UPP
VIO/VANA
Signals between UPP-Flash
Mbus from Prommer->UEMC->UPP(MbusRx)
FbusRx from Prommer->UEMC->UPP
FbusTx from UPP->UEMC->Prommer
Cx87 "Wrong MCU ID." RFClock
UPP(Vcore)
Startup
for
flashing
Required startup for flashing Vflash1
VBatt
Table 3: Flash Programming Error Codes (Continued)
Error Description Not Working Properly

Nokia Customer Care Baseband Description and Troubleshooting
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Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 19
Charging Operation
Battery
The 2115i/2116/2116i uses a Lithium-Ion cell battery with a capacity of 1070 mAh.
Reading a resistor inside the battery pack on the BSI line indicates the battery size. The
mobile terminal measures the approximate temperature of the battery on the BTEMP line
with an NTC resistor on the PCB.
The temperature and capacity information are needed for charge control. These resistors
are connected to the BSI pin of the battery connector and the BTEMP of the mobile
terminal. The mobile terminal has 100 kΩpull-up resistors for this line so that they can
be read by A/D inputs in the mobile terminal.
Figure 10: BL-6C battery pack pin order
Charging Circuitry
The UEMC ASIC charge control is dependent on the charger type and the battery size.
External components are needed for electromagnetic compatibility (EMC), reverse
polarity, and transient protection of the input to the baseband module. The charger
connection is through the system connector interface. The baseband supports DCT3
chargers, including both 2- and 3-wire type chargers. However, 3-wire chargers are
treated as 2-wire chargers.

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Page 20 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Figure 11: Charging circuitry
Charger Detection
Connecting a charger creates voltage on the VCHAR input of the UEMC. Charging starts
when the UEMC detects the VCHAR input voltage level above 2 V (VCHdet+ threshold).
The VCHARDET signal is generated to indicate the presence of the charger for the
software. The energy management (EM) software controls the charger identification/
acceptance. The charger recognition is initiated when the EM software receives a
”charger connected” interrupt. The algorithm basically consists of the following three
steps:
1. Check that the charger output (voltage and current) is within safety limits.
2. Identify the charger as a 2- or 3-wire charger.
3. Check that the charger is within the charger window (voltage and current).
Over temperature
detection
Watchdog
PWM generator
Switch driver
Control logic Current
sensing/limit
+
Comp
-
UEMC
VCHAR
VCHAR in VCHAR out
Vmstr
VBATT
VBATT lim
PWM
Battery
VBATT