TCS2315 GPRS mobile phone solution
TI's TCS2315 GPRS mobile phone solution is the third-generation GSM-based ultra-low-cost mobile phone. It adopts advanced 65-nm process technology and integrates TMS320C54x â„¢ DSP and ARM7 core and digital RF DRP â„¢ technology on a single chip. Performance and powerful functions such as GPRS function, built-in VGA function supports JPEG codec and advanced image functions such as rotation and zoom, etc. USB connection and Bluetooth connection for data transmission between PC and mobile phone, mainly suitable for India and China , Russia and Brazil markets. This article introduces the main performance characteristics and indicators and block diagram of the TCS2315 GPRS mobile phone solution.
TIs third-generaTIon GSM-based soluTIons for the Ultra
Low-Cost (ULC) Handsets
Leveraging an advanced 65-nm process with TMS320C54x â„¢
DSP and ARM7 cores in the same package, the TCS2315 GPRS
solution integrates TIs breakthrough digital RF DRP â„¢
technology to offer the most compelling user experience in
Ultra Low-Cost (ULC) handsets. Part of the LoCosto ULC family,
the TCS2315 enables handsets with high performance, robust
functionality and innovative form factors in the most
price-sensitive handsets. Ideal for emerging markets such as
India, China, Russia and Brazil where the next billion
subscribers will come from, the scalability and flexibility of
the TCS2315 LoCosto ULC GPRS chipset also allow it to be
deployed in enhanced handsets for value-conscious segments in
more mature markets.
Software portability from one generation of LoCosto solution
to the next gives manufacturers and operators the ability to
rapidly and cost-effectively differentiate handsets and
service offerings for both emerging and mature markets,
crossing over regional borders, language barriers and
subscriber requirements.
A set of enhanced capabilities are now possible in ULC
handsets, such as a relatively high-resolution color display
without requiring additional external SRAM, VGA camera
support, MP3 playback and mass storage (SD / MMC), USB and
Bluetooth® connectivity, high-end full duplex voice
quality, a MIDI player with 32 polyphonics, MP3 and polyphonic
ringers, longer talk time and standby time, stereo FM radio
connectivity, USB charging, handsfree speakerphone operation,
vibration ringer, headset support and other functionality.
Equipped with TIs scalable and hardware-based M-Shield â„¢
security technology, a TCS2315 handset offers ironclad
protection of the owners personal information. M-Shield also
prevents the unlocking of the handsets SIMlock code, defeating
attempts to switch networks. High-value content and IP can be
fully protected from tampering, piracy and malicious attacks.
Innovative user form factors such as ultra-slim, clamshell and
candybar handsets are possible because of the reduced
component count and PCB board space requirements brought about
by the smaller 65-nm process node, increased integration, and
advanced packaging technologies for a single-chip solution. In
addition, a smaller PCB area requirement allows a handset to
support larger batteries for a longer battery life enabling
extended standby and talk times. The superb full-duplex
quality of voice service of the
"LoCosto ULC" solutions are comparable to more expensive
handsets. In fact, the voice loudness on both ends of a call
can be improved by 7 dB or practically twice as loud.
Moreover, voice chopping and double talk are reduced
dramatically, making handsets based on the TCS2305 and TCS2315
solutions very effective in handsfree applications and noisy
environments, characteristic of densely populated emerging
markets. The TCS2305 and TCS2315 also offer SMS text
messaging, a Universal Subscriber Identity
Module (USIM) interface for SIM cards and support for a
standard keypad and joy stick.
Lowering the power dissipation in the advanced “LoCosto ULCâ€
solutions extend the battery life of a handset, lengthening
the standby and talk times for users. “LoCosto ULCâ€
single-chip platform integrates power management functions for
best-in-class power consumption levels and supports USB
charging for universal and easy charger access. This
eliminates the need to supply a charger with the phone (saving
costs) and minimizes electronic waste from incompatible or
obsolete chargers.
Concerns over the security of wireless handsets are completely
mitigated by TI is scalable and hardware-based M-Shield â„¢
technology. The “LoCosto ULC†solutions take advantage of
M-Shield technology to safeguard not just the handset owner is
sensitive personal information, but it also defeats malicious
attempts to unlock the handset is SIMlock code. Cracking the
SIMlock code can increase subscriber churn because users are
able to switch a handset that had been locked to one network
to another provider is network. To reduce phone theft and
protect the service provider is investment in subsidized
handsets, TI is M-Shield technology secures the contents of
flash memory,
including boot code, and provides robust SIMLock and handset is
International Mobile Equipment Identity (IMEI) protection.
This level of protection is simply not possible with
software-based security systems.
TI is M-Shield security technology includes secure read-only
memory (ROM), unique hardware-based public keys, and other
protection measures to safeguard valuable information, data
and software stored on a handset, including sensitive personal
information of handset owners as well as the device is boot
code and other critical firmware modules provided by the
handset manufacturer. The investment handset manufacturers
have made in developing software and other intellectual
property (IP) is protected against piracy and the handset
itself is safeguarded against malicious attackers attempting
to install viruses, worms and other unwanted software on the
device.
Fabricating the “LoCosto ULC†solutions with 65-nm process
technology as well as several other chip- and system-level
cost optimization techniques all contribute to the device is
sustainable ULC characteristics. For example, the electronic
bill of materials (eBOM) for an entry-level ULC handset is
reduced by up to 25 percent with the “LoCosto ULC†solutions
compared with the previous generation. Additionally,
fabricating the chip at a smaller process node means that the
chip itself is substantially smaller. This, along with
component reduction, reduces the size of a handset is PCB,
lowering the manufacturing cost of the cell phone. Integration
of the power management with the digital baseband into a
single chip also yields reduction in the modem PCB area.
Other system-level cost reduction features include the ability
of TCS2305 and TCS2315 solutions to support a full 128 x 160,
65-k color display with no additional external SRAM memory.
Circuitry for power management for phone peripherals like
headsets and battery charging is also integrated on-chip to
further reduce costs by lowering chip count.
Integrating TIs innovative DRP RF architecture into the
TCS2305 and TCS2315 solutions add another dimension to
lowering the cost of a mobile phone. DRP technology applies
digital techniques to simplify radio frequency processing and
dramatically cuts the cost and power consumption of
transmitting and receiving information wirelessly. Processing
radio signals with digital logic can significantly simplify
the implementation and enhance the scalability of wireless
communications capabilities.
By integrating DRP technology into the LoCosto family of
wireless solutions, functions that were previously implemented
in discrete devices have now been combined in a single-chip
solution. With the RF section included in one device, space
requirements and component counts are reduced. At the same
time, interconnects are minimized, greatly improving the
handset is reliability.
By digitizing analog functionality, testability and
manufacturing cycle time are improved with built-in
calibration, drift effects are reduced and auto-compensation
for process and temperature variances is enabled. All of these
advantages add to the cost savings by reducing the size of the
underlying platform and enabling handsets in sleeker, more
compact form factors.
TCS2315 GPRS main features (in addition to TCS2305 functions, many new functions have been added):
Features and Specifications for TCS2305 (GSM)
65-nm process technology, single-chip solution
GSM voice:
Dual band: 850/1900 or 900/1800 or 850/1800 or 900/1900
Codecs: HR, FR, EFR, AMR
Acoustic algorithms for high-quality full-duplex voice: AEC,
ANR, IIR, FIR, AGC, DRC, WMC
SAIC and TTY Support
ARM7TDMI and TMS320C54x DSP, both at 104 MHz
DRP technology
Black and white (96 x 96 pixels) and Color LCD support (up to
65 k,
128 x 160); no external SRAM memory needed; enhanced color use
case support
Improved acoustic performance (Full duplex voice call support
and up to 2X louder)
Ringers:
MIDI ringtone and playback-16 polyphonics
CD-quality (44.1 kHz) MP3 ringers
Integrated support for broadcast stereo FM radio reception and
playback
Ability to record FM for on-the-fly ringers
Headset, handsfree, vibrator
Lower power consumption for up to 60 percent longer standby
and 30-percent talk time
USB charging for universal and easy charger access
Hardware security (Flash content protection, ME
personalization, IMEI protection) OMTP1.0 compliant
WLED support
USIM interface to either 1.8-V or 3-V SIM cards
Standard 5 x 5 keyboard and joy stick
Features and Specifications for TCS2315 (GPRS)
All the features of TCS2305, plus:
GPRS capability
MIDI ringer player support, 32 polyphonics
Built-in VGA camera support
MP3 stereo playback
USB connectivity
Mass storage capability (SD / MMC)
Figure 1. TCS2315 "LoCosto ULC" GPRS mobile phone block diagram
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