TCS2315 GPRS手機解決方案

TI 公司的TCS2315 GPRS手機解決方案是第三代基于GSM的超低成本手機，采用先進的65-nm工藝技術(shù)，在單片上集成了TMS320C54x™ DSP 和ARM7核以及數(shù)字RF DRP™ 技術(shù)，具有高性能以及強大的功能如GPRS功能，內(nèi)置的VGA功能支持JPEG編譯碼和先進的圖像功能如旋轉(zhuǎn)和變焦等，用來在PC和手機間數(shù)據(jù)傳輸?shù)?a target="_blank">USB連接以及藍牙連接等，主要適合印度，中國，俄羅斯和巴西等國市場。本文介紹了TCS2315 GPRS手機解決方案的主要性能特點和指標以及方框圖。

                  TIs third-generation GSM-based solutions for the Ultra
                  Low-Cost (ULC) Handsets
                  Leveraging an advanced 65-nm process with TMS320C54x™
                  DSP and ARM7 cores in the same package, the TCS2315 GPRS
                  solution integrates TIs breakthrough digital RF DRP™
                  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™
                  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 ULC”
                  solutions extend the battery life of a handset, lengthening
                  the standby and talk times for users. “LoCosto ULC”
                  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™
                  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 主要特性（除了TCS2305功能外，還新增了許多功能）：
                  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)

                  圖1.TCS2315 “LoCosto ULC“ GPRS手機方框圖