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AT75C320 Datasheet

  • AT75C320

  • Smart Internet Appliance Processor

  • 13頁

  • ATMEL   ATMEL

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Features
ARM7TDMI
廬
ARM
廬
Thumb
廬
Processor Core
Two 16-bit Fixed-point OakDSPCore
廬
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 Timers/Counters
Additional Watchdog Timer
Two USARTs with FIFO and Modem Control Lines
Industry -standard Serial Peripheral Interface (SPI)
Up to 24 General-purpose I/O Pins
On-chip SDRAM Controller for Embedded ARM7TDMI and OakDSPCore
JTAG Debug Interface
Software Development Tools 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
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Available in 160-lead PQFP Package
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2.5V Power Supply for the core and the PLL Pins, 3.3V Power Supply for Other I/O Pins
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Smart Internet
Appliance
Processor
(SIAP
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)
AT75C320
Preliminary
Description
The Atmel AT75C320 Smart Internet Appliance Processor (SIAP
鈩?/div>
) is a high-perfor-
mance processor specially designed for Internet appliance applications, such as
Internet telephony (Voice-over-Internet Protocol 鈥?VoIP). The AT75C320 is a derivative
version of the AT75C310. The device is built around an ARM7TDMI microcontroller
core running at 40 MIPS with two DSP co-processors running at 60 MIPS each 鈥?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 AT75C320 with three levels of software modules:
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a special port of the Linux
廬
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 H.323 telephony or
POP-3/SMTP e-mail services.
Rev. 1769A鈥?7/01
1

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