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AT75C221 Datasheet Smart Internet Appliance Processor

Manufacturer: Atmel (now Microchip Technology)

General Description

The AT75C221, Atmel’s latest device in the family of smart internet appliance processors (SIAP™), is a high-performance processor designed for professional internet appliance applications such as the Ethernet IP phone.

The AT75C221 is built around an ARM7TDMI microcontroller core running at 40 MHz with an OakDSPCore coprocessor running at 60 MHz and a dual Ethernet 10/100 Mbits/sec MAC interface.

In a typical standalone IP phone, the DSP handles the voice processing functions (voice pression, acoustic echo cancellation, etc.) while the dual-port Ethernet 10/100 Mbits/sec MAC interface establishes the connection to the Ethernet physical layer (PHY) that links the network and the PC.

Key Features

  • ARM7TDMI® ARM® Thumb® Processor Core.
  • In-Circuit Emulator, 40 MHz operation.
  • 16-bit Fixed-point OakDSPCore®.
  • Up to 60 MHz operations.
  • 104K bytes of Integrated Fast RAM, Codec Interface Ethernet Bridge.
  • Dual Ethernet 10/100 Mbps MAC Interface.
  • 16-Kbyte Frame Buffer 1 K-Byte Boot ROM, Embedding a Boot Program.

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