AT75C310 Datasheet, PDF (1/17 Pages) ATMEL Corporation – Smart Internet Appliance Processor

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
Description
The Atmel AT75C310 Smart Internet Appliance Processor (SIAP) is a high-perfor-
mance processor specially designed for Internet appliance applications, such as
Internet telephony (Voice over Internet Protocol – VoIP). The AT75C310 is built
around an ARM7TDMI microcontroller core running at 20 MIPS with two DSP co-pro-
cessors 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 it 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
Smart Internet
Appliance
Processor –
Electrical and
Mechanical
Characteristics
AT75C310
Rev. 1370A–07/00
1