AT75C221 Datasheet, PDF (1/23 Pages) ATMEL Corporation – Smart Internet Appliance Processor

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
– Enable Application Download from DataFlash^®
• External Bus Interface
– On-chip 32-bit SDRAM Controller
– 4 Chip Select Static Memory Controller
• Multi-level Priority, Individually Maskable, Vectored Interrupt Controller
• Three 16-bit Timer/Counters
• Two UARTs with Modem Control Lines
• Serial Peripheral Interface (SPI)
• Two PIO Controllers, Managing up to 48 General-purpose I/O Pins
• Supported by a Wide Range of Ready-to-use Application Software
– Multi-tasking Operating System, Networking
– Voice-processing Functions
• Available in a 208-lead PQFP Package and 256-ball BGA Package
• Power Supplies
– VDDIO 3.3V nominal
– VDDCORE and VDDOSC 1.8V nominal
• 0°C to + 70°C Operating Temperature Range
Smart Internet
Appliance
Processor
(SIAP^™)
AT75C221
Summary
Description
The AT75C221, Atmel’s latest device in the family of smart internet appliance proces-
sors (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 copro-
cessor 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 compression, 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. 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 AT75C221 with several software modules, including:
• A set of drivers for a Linux^® kernel capable of driving the embedded peripherals.
• A comprehensive set of tunable DSP algorithms for voice processing, tailored to
be run by the DSP subsystem.
6033CS–INTAP–05/04