Nokia 1508I Bedienungsanleitung
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
Nokia Customer Care
1508i (RM-430)
Mobile Terminal
Baseband Description and
Troubleshooting
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
Contents
BB Troubleshooting 1508i
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
1508i system brief introduction
1508i main features
1508i is a CDMA phone based on the VIA platform.
1) CDMA PCS support only
2) FM stereo radio
3) Compliance to USB 2.0 (full speed)
4) R-UIM card
The main devices
Device Model number Supplier
Baseband processor CBP 5.6 VIA
PMU ACT5805 Active
Memory S71GL064NB0BFW0Z0 SPANSION
LCD BYD4205T BYD
FM Stereo radio Si4702-B16-GM SILICON LABS
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
Figure 1 Component layout (Bottom)
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
System Block Diagram
System Description
1508i is a CDMA (PCS band) Mobile Phone. The phone supports:
- forward and reverse link data rates of up to 153.6kbps.
- 4GV vocoder
- 1.47”(128*128) CSTN LCD
- Stereo FM radio
Platform Introductions
CBP 5.6
VIA Telecom’s CBP 5.6 single-chip CDMA Base Band
Processors provide a complete 3G CDMA2000® 1X
(Release 0) solution. They are designed to meet or exceed
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
the specifications of mobile stations for worldwide 3G CDMA
systems as specified by CDMA2000® 1X (Release 0)
standards and are backward-compatible to IS -95.
CBP 5.6 integrates three processor subsystems:
ARM7TDMI® Control Processor (CP) supports the protocol
stack, user interface, and hardware interface processing.
Two TeakLite® Digital Signal Processors (DSPs): one DSP
supports CDMA modem processing, the second DSP
supports CDMA voice processing
The main features of the CBP 5.6
zSupports CDMA2000® 1X (Release 0)
zBackward compatible to IS-95 standards
zSupports IS-2000 Quick Paging Channel for improved standby time
zSupport for multiple CDMA band classes (Band Class 0/US-Cellular,
Band Class 1/US-PCS, Band Class 3/JTACS, Band Class 4/Korean-
PCS); support for additional band classes which can be added upon
customer request
zSpecial purpose logic provides signal processing, modulation,
demodulation, hardware accelerators and interfaces for keypad and
display
zMixed signal circuitry for the Rx analog-to-digital converter (ADC), Rx
filter, Tx digital-to-analog converter (DAC), Tx filter, internal PLLs,
voice codec, auxiliary ADCs, auxiliary DACs, RF control and 32.768
kHz oscillator
zSupport for forward and reverse link data rates of up to 153.6 kbps
(CBP5.6 only).
z Dual supply voltage (1.8 V digital core, 3.0 V analog and 3.0 V digital
I/O)
z3.0 V or 1.8 V external memory interface
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
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zUSB support (12 Mbps)
zRemovable User Identity Module (R-UIM) compliant with IS-820
z32-voice polyphonic ringer
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
The interface of the CBP5.6 is described in the following
diagram. Receive and transmit interfaces for CBP 5.6
provide analog I and Q signals and support super-
heterodyne radio and direct conversion radio design. The
CP external-memory interface supports 3.0V or 1.8V, the
address bus supports 16-bit address which can support
three to six external devices via chip selects. CBP 5.6
includes 48 GPIOs and interrupts, some of which are
multiplexed with other functions. All GPIO pins are in input
state by default and use a large pull-up or pull-down resistor
value to minimize the current drain. The USB port supports
data rates of up to 12Mbps, the USB analog drivers and
48.00MHz PLL are integrated into CBP 5.6, the control
processor manages the USB function. Two independent
serial-peripheral interfaces are provided on CBP 5.6: one is
for RF control and the other is for general-purpose use. The
R-UIM interface supports 3V UIM cards and consists of five
pins, these pins are multiplexed with another function. The
CP manages the R-UIM function.
Five independent PDM DACs are supplied on the CBP 5.6
chip.
Three of the outputs are dedicated to radio-control signals
for Rx automatic gain control (AGC), Tx AGC, and automatic
frequency control (AFC). The fourth and fifth PDM outputs
are spares. The PDMs are 12-bit DACs and have a
guaranteed output range of 0.2 V to 2.5 V.
The 12-bit auxiliary ADC supports eight independent
external channels on pins AUXADC [7:0]. There are also
eight internal channels used to measure internal analog
voltages. The input voltage range is 0.2 V to 2.7 V. The
conversion time is 156 µsec. The typical uses of the external
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
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auxiliary ADC channels include: Tx RF power measurement,
battery voltage, and temperature sensors.
The baseband is powered by the following PMU ACT5805 regulators:
VDD_DIG = 3.0v
VDD_CORE = 1.8v
VDD_TXPLL = 3.0v
VDD_TCXO = 3.0v
VDD_ANALOG =3.0v
VDD_RX = 3.0v
VDD_TX = 3.0v
VIB_P=2.8v~3.6v
1508i(RM-430)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
Copyright © 2008 Nokia, All rights reserved
Power Up
The mobile terminal uses the power key and a charger to power up.
Power Key
When the power key is pressed, the PMU enters the power-up sequence.
Pressing the power key causes the POWER_ON pin to VBAT. The
POWER_ON signal is not part of the keypad matrix. The power key is
connected to the PMU. This means that when the power key is pressed, an
interrupt will be generated to the CBP in order to power on the CBP. The CBP
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