參數(shù)資料
型號(hào)： ADSP-21mod970
廠商： Analog Devices, Inc.
英文描述： Multi-Port Internet Gateway Processor(多口網(wǎng)關(guān)處理器)
中文描述： 多端口Internet網(wǎng)關(guān)處理器（多口網(wǎng)關(guān)處理器）
文件頁數(shù)： 2/50頁
文件大?。?/td> 980K
代理商： ADSP-21MOD970
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ADSP-21mod970 Preliminary Data Sheet
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Update one or two data address pointers
Perform a computational operation
This takes place while the processor continues to:
Technca
Perform one or two data moves
General Note
This data sheet represents preliminary (x-grade) specifications for the ADSP-21mod970 Multi-Port
Internet Gateway Processor.
GENERAL DESCRIPTION
The ADSP-21mod970 is a single-chip, multi-port Internet gateway processor optimized for
implementation of a complete V.34/56K modem. All datapump and controller functions can be
implemented on a single chip, offering the lowest power consumption and highest possible modem port
density.
The ADSP-21mod970 combines the ADSP-2100 Family base architecture (three computational units,
data address generators, and a program sequencer) with two serial ports, a 16-bit internal DMA port, a
byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities, and on-chip program
and data memory.
The ADSP-21mod970 integrates 960 bytes of on-chip memory, configured as 192 K words (24-bit) of
program RAM, and 192 K words (16-bit) of data RAM. Power-down circuitry is also provided to meet
the low power needs of battery operated portable equipment. The ADSP-21mod970 is available in a 31
sq-mm., 304-lead PBGA package.
Fabricated in a high-speed, low-power, CMOS process, the ADSP-21mod970 operates with a 19 ns
instruction cycle time. Every instruction can execute in a single processor cycle.
The ADSP-21mod970’s flexible architecture and comprehensive instruction set allow the processor to
perform multiple operations in parallel. In one processor cycle, the ADSP-21mod970 can:
Generate the next program address
Fetch the next instruction
Receive and transmit data through the two serial ports
Receive and/or transmit data through the internal DMA port
Receive and/or transmit data through the byte DMA port
Decrement timer
Modem Software
The modem software executes general modem control, command sets, error correction, and data
compression, data modulations (for example, V.90 and V.34), and host interface functions.The host
interface allows system access to modem statistics, such as call progress, connect speed, retrain count,
symbol rate, and other modulation parameters.
The modem datapump and controller software reside in on-chip SRAM and do not require additional
memory. The user can configure the ADSP-21mod970 dynamically by downloading software from the
host through the 16-bit DMA interface. This SRAM-based architecture provides a software upgrade path
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