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參數(shù)資料
| 型號： | ADSP-21MOD970-510 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 調(diào)制器/解調(diào)器 |
| 英文描述： | Multiport Internet Gateway Processor Data Pump Solution(多端口網(wǎng)關處理器數(shù)據(jù)泵解決方案) |
| 中文描述： | 56 kbps DATA, 8 kbps FAX, MODEM, PBGA304 |
| 封裝： | PLASTIC, BGA-304 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 94K |
| 代理商： | ADSP-21MOD970-510 |
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ADSP-21mod970-510
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Table I. Product Selection Guide
Number
of Ports
Controller
Implementation
DSP
MIPs
Product
Package
ADSP-21mod970-510 Data Pump Solution*
12
External to the device.
Designed by the OEM.
Internal to the device.
Included in the solution.
Not Applicable.
Stand-Alone Device.
312
304 PBGA
ADSP-21mod970-110 Integrated Modem Solution*
6
312
304 PBGA
ADSP-21mod970-000 Device
312
304 PBGA
—
NOTE
*Solution denotes a product offering that includes an ADSP-21mod970-000 device and DSP software from ADI for the supported functions.
PRODUCT SELECTION
Analog Devices has developed an entire family of Internet Gate-
way products that support a diverse set of applications. The
ADSP-21mod970-510 is a twelve-channel solution that includes
data pump functions and requires an external controller. The
ADSP-21mod970-110 is a six-channel solution that includes all
data pump and controller functions.
INTRODUCTION
The ADSP-21mod970-510 is a complete data pump solution in
a single device. Its Multiport Internet Gateway Processor architec-
ture is optimized for implementation of a twelve-channel,
V.34/56 kbps data pump. It combines a highly integrated DSP
processor with downloadable software. All data pump functions
are implemented on a single 1.45-square-inch device. This
package allows the highest port density while achieving the
lowest power consumption in a software upgradable platform.
The ADSP-21mod970 is designed for high density systems such
as remote access servers (see Figure 1). Its high performance
DSP core, large on-chip SRAM, TDM serials port, and 16-bit
DMA port provide efficient control and data communication with
minimal chip count. The modem software provides a number of
data modulations, such as V.34, 56 kbps PCM and ISDN with a
software upgrade path to future standards and new applications,
such as voice over network. The controller interface allows system
access to modem statistics such as call progress, connect speed and
modulation parameters such as retrain count and symbol rate.
SYSTEM ARCHITECTURE
Communication between the controller processor and the mo-
dem processor can be divided into five basic functions:
1. Booting the DSP
2. Accessing mailbox locations to exchange control information
with the modem
3. Accessing data through FIFOs within the modem
4. Accessing statistics and telemetry data from the modem
5. Loading an image to the DSP upon request from the data
pump.
All of these functions are achieved through access of the modem
processor’s internal memory by the controller.
ON-CHIP SRAM
The ADSP-21mod970 processor integrates 960K bytes of on-
chip memory. The modem data pump software, as well as data
storage, are contained in the on-chip SRAM. The SRAM cells
are a proprietary design by Analog Devices. These cells are
optimized for high speed digital signal processing and low power
consumption. The ADSP-21mod970 can be configured dy-
namically with software through the 16-bit DMA interface.
CONTROLLER OPERATIONS
There are three kinds of controller operations. These are:
Boot Loading
Mailbox Access
Data FIFO Access
The following sections describe basic modem operations.
Boot Loading
The internal program memory (PM) and data memory (DM) of
the ADSP-21mod970 modem processor can be loaded with
modem code and data by a controller processor via the DMA
bus. The DMA port of the modem processor can be used to
load code and data into the processor’s internal memory at any
time. The first requirement for loading code and data involves
boot loading the modem processor after reset.
DATA PUMP
STATE
MACHINE
MODULATOR
ECSM
LAP-M
TRANSMIT
DECOMPRESSION
AT PARSER
EXTERNAL CONTROLLER
CONTROL
SEQUENCER
ADSP-21mod970-510
DATA PUMP
DSM
LAP-M
RECEIVE
COMPRESSION
HDLC
TRANSMIT
HDLC
RECEIVE
DEMODULATOR
MSM
Figure 2. System Architecture
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| ADSP-21MOD980-000 | 制造商:Analog Devices 功能描述: |
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