AT75C310

Features:

• ARM7TDMI™ ARM^® Thumb^® Processor Core
• Two 16-bit Fixed-point OakDSPCore^® Cores
• 256 x 32-bit Boot ROM
• 88K Bytes of Integrated Fast RAM for Each DSP
• Flexible External Bus Interface with Programmable Chip Selects
• Dual Codec Interface
• Multi-level Priority, Individually Maskable, Vectored Interrupt Controller
• Three 16-bit Timer/Counters
• Additional Watchdog Timer
• Two USARTs with FIFO and Modem Control Lines
• Industry Standard Serial Peripheral Interface (SPI)
• Up to 23 General-purpose I/O Pins
• On-chip DRAM Controller
• JTAG Debug Interface
• Software Development Suites Available for ARM7TDMI and OakDSPCore
• Supported by a Wide Range of Ready-to-use Application Software, including Multitasking Operating System, Networking, Modems, and Voice-processing Functions
• Available in 160-lead PQFP Package
• 3.3V Power Supply


Specifications

Operating Temperature (Commercial).............0°C to +70°C
Voltage on Any Input Pin
with Respect to Ground-..................................0.5V to +4.0V
Maximum Operating Voltage..........................................4.6V

*NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods mayaffect device reliability.


Description

The Atmel AT75C310 Smart Internet Appliance Processor (SIAP) is a high-performance processor specially designed for Internet appliance applications, such as Internet telephony (Voice over Internet Protocol VoIP). The AT75C 310 is built around an ARM7TDMI microcontroller core running at 20 MIPS with two DSP co-processors running at 40 MIPS each all three processors delivering unmatched performance for low power consumption.

In a typical standalone VoIP phone, one DSP handles the voice-processing functions (voice compression, acoustic echo cancellation, etc.), while the other one deals with the telephony functions (dialing, line echo cancellation, callerID detection, high-speed modem, etc.). In such an application, the power of the ARM7TDMI allows AT75C310 to run the VoIP protocol stack as well as all the system control tasks.

Atmel provides the AT75C310 with three levels of software modules:
• a special port of the Linux kernel as the proposed operating system
• a comprehensive set of tunable DSP algorithms for modems and voice processing, specially tailored to be run by the DSP subsystems
• a broad range of application-level software modules such as H323 telephony or POP-3/SMTP e-mail services