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AT75C220PBGA Datasheet

  • AT75C220PBGA

  • Smart Internet Appliance Processor (SIAP)(239.16 k)

  • 227.24KB

  • 14頁(yè)

  • ETC

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Features
ARM7TDMI
廬
ARM
廬
Thumb
廬
Processor Core
One 16-bit Fixed-point OakDSPCore
廬
Core
Dual Ethernet 10/100 Mbps MAC Interface with Voice Priority
Multi-layer AMBA
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Architecture
256 x 32-bit Boot ROM
88K Bytes of Integrated Fast RAM
Flexible External Bus Interface with Programmable Chip Selects
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
2.5V Power Supply for the Core and the PLL Pins, 3.3V for Other I/O Pins
Software Development Suites Available for ARM7TDMI and OakDSPCore
Supported by a Wide Range of Ready-to-use Application Software, Including
Multitasking Operating System, Networking and Voice Processing Functions
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Available in a 208-lead PQFP Package
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Smart Internet
Appliance
Processor
(SIAP
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)
AT75C220
Preliminary
Description
The AT75C220, Atmel鈥檚 device in the family of smart Internet appliance processors
(SIAP), is a high-performance processor specially designed for professional Internet
appliance applications, such as the Ethernet IP phone. The AT75C220 is built around
an ARM7TDMI microcontroller core running at 40 MIPS with an OakDSPCore co-pro-
cessor running at 60 MIPS and a dual-port Ethernet 10/100 Mbps MAC interface.
In a typical standalone IP phone, the DSP handles the voice processing functions
(voice compression, acoustic echo cancellation, etc.), while the dual-port Ethernet
10/100 Mbps MAC interface establishes the connection to the Ethernet physical layer
(PHY), which links the network and the PC. In such an application, the power of the
ARM7TDMI allows it to run a VoIP protocol stack as well as all the system control
tasks.
Atmel provides the AT75C220 with three levels of software modules:
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A special port of the Linux kernel as the proposed operating system
A comprehensive set of tunable DSP algorithms for voice processing, specially
tailored to be run by the DSP subsystem
A broad range of application level software modules such as H323 telephony or
POP-3/SMTP e-mail services
Rev. 1396BS鈥?3/01
1

AT75C220PBGA相關(guān)型號(hào)PDF文件下載

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    The AT75C DSP subsystem is a fully autonomous DSP-based comp...

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