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Product Brief April 2003
T8303 Phone-On-A-ChipTM IP Solution
Application
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T8303 Feature Summary
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Voice over internet protocol (VoIP) telephone.
Solution Features
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Complete VoIP telephone solution: -- No dependency on external processor. -- All of the required software components provided in the form of binary and/or source code. -- Development board with integrated demo voice application using H.323 and session initiation protocol (SIP) protocols. -- Complete system solution includes Wind River Systems VxWorks(R) real-time operating system (RTOS), Trillium Digital Systems(R) H.323 and SIP, Agere's G.7XX voice codecs. High integration requires fewer external components: -- Single Ethernet port with embedded PHY and MAC. -- Integrated differential inputs provide high noise immunity for analog signals. -- Integrated reset control circuit reduces design complexity and board space.
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T8303 features include: -- 3.3 V device in 272-pin PBGA package. -- ARM (R) 940T and DSP1600 cores running at 100 MHz clock speed. -- Integrated 10/100 Base-T Ethernet MAC and PHY. -- IrDA, UART, external memory interface (EMI), SSI, and 16-bit parallel I/O. -- Two 16-bit DACs; one 16-bit ADC. -- GCI+ interface, bit I/O, and serial I/O. -- Three-way hybrid conferencing. -- G.711 appendices I & II, G.723.1, G.726, G.729A, G.729B, and wideband G.722. -- Voice activity detection and comfort noise generation. -- DTMF generation. -- Acoustic echo cancellation for full-duplex speakerphone. -- Open listening support. -- Two differential analog inputs and one singleended analog input. -- Two differential analog outputs and one singleended analog output.
Figure 1. Phone-On-A-Chip Development Board Block Diagram
T8303 Phone-On-A-Chip IP Solution
Product Brief April 2003

Description
The Phone-On-A-Chip is a complete VoIP single-chip solution. The T8303, along with minimal additional components, provides all the active functions required to implement a complete VoIP based telephone. As shown in Figure 1, chip interfaces have been provided to allow direct integration into a system design; reducing time to market, implementation risk, and component cost. The network interface is implemented as an autonegotiating 10/100 Mbits/s Ethernet based LAN. The chip includes an Ethernet port with priority queuing running at 10/100 Mbits/s. A fully functional MII interface facilitates other external PHYs compatible with the 802.3 MAC.

H.323 and SIP phone sample application API wrapper to interface with the Trillium H.323 and SIP protocol stacks. Board support package (BSP) for Phone-OnA-Chip development board. Complete set of device drivers. Source code for DSP API and sample jitter buffer management.
Digital Signal Processor Features
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T8303 Detailed Features
Microprocessor Features
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Core: -- ARM 940T core with 4 Kbyte instruction cache and 4 Kbyte data cache. -- Clock speed of 100 MHz (110 MIPS). -- System memory interface to ARM with support for SDRAM, Flash, and SRAM. -- 1 K x 32 on-chip SRAM. Peripherals: -- Ethernet: Integrated 802.3 MAC controller. Integrated 10/100 Mbits/s PHY. Two Ethernet port hardware queues for handling priority processing of voice traffic per IEEE(R) 802.1p and 802.1q. VLAN support with tag insertion, tag deletion, tag modification. Hardware support for network management (SNMP/RMON). -- IrDA infrared communication interface. -- UART interface. -- Synchronous serial communications controller and interface. -- 16-bit parallel I/O. -- LED control interface for 72 LEDs. -- Keyboard scan circuitry with support for 72 keys. -- Four general-purpose timers. -- Real-time clock. -- JTAG support for ARM development tools. Software: -- Objects: ITU-T H.323 and IETF SIP protocol stacks. RTP/RTCP. -- Sample source code:
Core: -- DSP1600 core with 48 K x 16 ROM and 16 K x 16 RAM (zero wait-state, DPRAM); 12 K SRAM (single wait state) data. -- DSP clock speed of 100 MHz. -- GCI interface. -- Two timed DMA outputs for simultaneous handset and speaker audio output. -- Two serial I/O interfaces. -- Bit I/O interface. -- General-purpose timer counter. Peripherals: -- Low-pass filtering on audio inputs and outputs. -- 16-bit analog-to-digital converter. -- Two 16-bit digital-to-analog converters. -- Programmable gain amplifier on audio input. -- Two differential and one single-ended audio input for use with speakerphone, handset, and/or headphone. -- Fixed gain amplifier for differential inputs. -- One single-ended audio output to drive a standard 150 handset speaker. -- Two sets of differential audio outputs to drive 125 mW into 16 speakers. Software: -- G.711 Appendices I & II, G.723.1, G.726, and G.729A, G.729B, wideband G.722. -- Voice activity detection. -- Local loop support, dial tone, busy tone, call waiting tone, ring-back tone, and network busy tone. -- Comfort noise generation. -- Acoustic echo cancellation for full-duplex speakerphone.
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General Features
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Additional features include: -- 3.3 V device in 272-pin PBGA package. -- JTAG boundary-scan capability. -- JTAG tools (debug) capability. -- Only two external crystals required.
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Agere Systems Inc.
Product Brief April 2003
T8303 Phone-On-A-Chip IP Solution
The Chip Set Functions
Figure 2. T8303 Block Diagram The chip functions are depicted in the Phone-On-AChip block diagram above. Some of the key functions included in this chip are described in the following two sections. PHY that is configurable for 10/100 Mbits/s, full-/halfduplex. This eliminates the need for an external PHY and allows the board to have a smaller footprint.
Prioritization of Real-Time Data Integrated Amplifiers
All the gain amplifiers are integrated on the T8303, eliminating the need for external amplification. QoS support is provided in accordance with IEEE 802.1p and 802.1q.
Data and Instruction Cache Adaptable Acoustic Echo Cancellation
The adaptable acoustic echo cancellation algorithm automatically adjusts the AEC for the environment (room size, telephone housing, etc.). The ARM940T processor core offers the benefit of 4 Kbytes instruction cache and 4 Kbytes data cache.
Advantages of Phone-On-A-Chip
Tone Generation
DTMF, ringing, and call progress tones are generated by the T8303. The particular tone is selected via an API command.
Lower Total System Cost
Phone-On-A-Chip eliminates the need for expensive glue logic. All the required interfaces such as keypad, LED, amplifiers, and PHY are integrated within the device.
Integrated PHY
The Ethernet port is integrated with an 802.3 MAC and Agere Systems Inc.
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T8303 Phone-On-A-Chip IP Solution
Product Brief April 2003
ments the T8300, which has two Ethernet ports.
Advantages of Phone-On-A-Chip
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High Sound Quality
The differential amplifiers for the speaker and the microphone are integrated into the chip, providing very high sound quality at low cost.
Building a System with Phone-On-AChip
A development kit has been designed to help customers expedite their IP telephone product launch by reducing the development cycle significantly. The development kit provides a turnkey demo solution to plug and play with the H.323 and SIP protocol stack based applications. The development design kit includes the following:
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Reduced Development Time
A development kit bundled with the required sample source code and binaries gives a jump start for the development of application code that can easily be migrated to target products. This development board can be easily shrunken into a cost-effective solution.
Welcome letter and a getting started guide. Two complete IP telephone development boards. Integrated solution including H.323 and SIP based sample application to allow quick evaluation. CD including all the binaries, sample source code, all necessary documentation, and tools. Schematic diagrams, PCB layout source files, and bill of materials. Development board layout files. Phone-On-A-Chip device datasheets. Application notes. FAE regional customer support for one year.
High Performance and QoS
QoS support is provided in accordance with IEEE 802.1p and 802.1q. A four-channel DMA ensures fast data transfers between user interfaces and memories to supplement the performance.
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Extended Alliance Programs
Agere has formed alliances with industry leaders to ease product development enabling fast time to market. Relationships with Wind River Systems and Trillium Digital Systems provide value pricing for integration of hardware and software. Agere has qualified RealTime Digital Inc. as a third-party vendor to customize the DSP code parameters.
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Industry Proven Functionality
The T8303 mitigates development risk by integrating the proven functionality of Agere's T8301/T8302 VoIP phone chip set into a single chip solution. The T8301/ T8302 has been successfully deployed by VoIP phone manufacturers. Therefore, the T8303 incorporates a proven design with field tested software, and comple-
This integrated solution approach provides a self-contained VoIP telephone solution, allowing our customers to concentrate on system-related issues. The development kit reference design can easily be adapted to provide a commercial product.
Wind River Systems and VxWorks are registered trademarks of Wind RiverSystems Inc. Trillium and Trillium Digital Systems are registered trademarks of Trillium Digital Systems, Inc. ARM is a registered trademark of ARM Ltd. IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http://www.agere.com E-MAIL: docmaster@agere.com N. AMERICA: Agere Systems Inc., Lehigh Valley Central Campus, Room 10A-301C, 1110 American Parkway NE, Allentown, PA 18109-9138 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon Tel. (852) 3129-2000, FAX (852) 3129-2020 CHINA: (86) 21-5047-1212 (Shanghai), (86) 755-25881122 (Shenzhen) JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 6778-8833, TAIWAN: (886) 2-2725-5858 (Taipei) EUROPE: Tel. (44) 1344 296 400
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. Agere, Agere Systems, the Agere logo, and Phone-On-A-Chip are trademarks of Agere Systems Inc.
Copyright (c) 2003 Agere Systems Inc. All Rights Reserved
April 2003 PB03-114IPT

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