Telecom / Infrastructure

NAMC-ADSP

Overview

The NAMC-ADSP is a multi-purpose (tele-)communication resource board in AMC (Advanced Mezzanine Card) form factor, being equipped with either 8 or 16 Blackfin DSPs from Analog Devices.

The NAMC-ADSP is targeted at applications in communication environments with extensive need for voice or data computation. The module is designed to process standard telecom algorithms like voice and data compression and decompression or DTMF detection and generation.

The module is capable of handling individual timeslots transmitted via I-TDM protocol over backplane Gigabit-Ethernet. The design is optimized for handling in parallel as many timeslots (TDM data) as possible. The TDM data streams are supplied by a standard I-TDM backplane interface located on port 0 and port 1 (redundant configuration) or port 8 of the AMC connector.

AMC-Interface

The NAMC-16ADSP is a single-width, half-height AMC module, also available in full-height. The PCIe-X1 lane directly connects the local bus and onboard devices to the backplane.

Backplane I-TDM Access

The TSI (Time Slot Interchanger) as well as the TDM-to-iTDM bridge are incorporated in a ECP2M50FPGA from Lattice. The TSI allows flexible routing as well as multi-casting of 64kbps timeslots between the various DSPs. The TDM-to-iTDM bridge converts the TDM oriented bit stream into Ethernet packets and vice versa. The Ethernet packets are sent and received via a 1000BaseT-BX Ethernet interface.

Each DSP is able to handle 256 bidirectional TDM channels. The NAMC-ADSP is providing up to 4096 timeslots of 64kbps bandwidth. Due to the FPGA design of the TSI (time slot assigner interchanger) controller sub-channeling or super-channeling is possible as well.

DSP Resources

The NAMC-ADSP-8 is equipped with eight ADSP-BF535P Blackfin CPUs from Analog Devices, running at a core frequency of 350MHz. The NAMC-ADSP-16 is equipped with sixteen ADSP-BF535P Blackfin CPUs in total. Each of the DSPs has 32MB of individual SDRAM as well as 1MB individual FLASH aside to ensure a most flexible and individual utilization of its resources.

Due to its internal design the Blackfin DSP is a very powerful processing engine with 700 MMACs (max.) and 3.5MIPS per TDM channel. Special coding algorithms that are often used in telecom environments, i.e. G.711, are built-in features.Beside special DSP cores from N.A.T. Analog Devices and other third parties offer cores for most commonly used applications including

• Multi-Rate Filter
• FFT
• Convolutional Encoders
• QAM, BPSK and QPSK modulation
• Image Processing

to name just few. The NAMC-ADSP is suitable for any voice/data application in any signalling or VoP solution such as in ISDN, SS7, ATM, VoIP or 3G environments are suitable.

GbE Interface and Compliance
GbE on port 0 and 1

IPMI and Compliance
PICMG AMC.0 R2.0
PICMG 2.9 R1.0

I-TDM
4096 bidirectional iTDM channels connecting to the DSP's serial ports

DSPs
ADSP-BF535P Blackfin DSPs from Analog Devices, 350MHz core frequency, 700 MMACS, 3.5MIPS per TDM channel,
8 pcs ADSP (NAMC-ADSP-8),
16 pcs ADSP (NAMC-ADSP-16)

Memory
32 MB SDRAM and 1MB FLASH per DSP

Indicator LEDs
16 software programmable LEDs (1 status indicator LED per DSP) at the front panel

Clocks
TCLK A-D as input supported
FCLKA or local 100MHz osc. as fabric reference clock

Host Operating System Support
OK-1, VxWorks, LINUX, dependent on application

Power Consumption
3.3V MP 0.1A (typ.)
12V 1.1A (typ.) (NAMC-ADSP-8)

12V 2.0A (typ.) (NAMC-ADSP-16)

Environmental
Temperature (operating): 0ºC to +60ºC with forced air cooling,
Temperature (storage): -40ºC to +85ºC
Relative Humidity: 10% to 90% at +55ºC (non-condensing)

Applications

• voice and data compression and deflating
• voice and data encryption and decryption
• DTMF detection and generation
• VoP
• special handling of signalling protocols (i.e. SS7, 3G TFO, etc.)