AT75C220
器件描述：Smart Internet Appliance Processor(SIAP??)
器件厂商：ATMEL [ATMEL Corporation]
文件大小：1917.13KB，共144页
Sponsor by e络盟器件资料摘要：
1
Features
• ARM7TDMI
™
ARM
®
Thumb
™
Processor Core
One 16-bit Fixed-point OakDSPCore
®
Dual Ethernet 10/100 Mbps MAC Interface with Voice Priority
Multi-layer AMBA
™
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 Timer/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 Multi-tasking Operating System, Networking
and Voice-processing Functions
Available in a 208-lead PQFP Package
Description
The AT75C220, 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 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 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) 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 AT75C220 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 voice processing, 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
Smart Internet
Appliance
Processor
(SIAP
™
)
AT75C220 –
CPU
Peripherals
Rev. 1396A–05/01
Features
• ARM7TDMI
™
ARM
®
Thumb
™
Processor Core
One 16-bit Fixed-point OakDSPCore
®
Dual Ethernet 10/100 Mbps MAC Interface with Voice Priority
Multi-layer AMBA
™
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 Timer/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 Multi-tasking Operating System, Networking
and Voice-processing Functions
Available in a 208-lead PQFP Package
Description
The AT75C220, 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 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 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) 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 AT75C220 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 voice processing, 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
Smart Internet
Appliance
Processor
(SIAP
™
)
AT75C220 –
CPU
Peripherals
Rev. 1396A–05/01