STM-0/1/4 (STS-1/3/12) Framer
Features
- Supports all SONET equivalents of SDH functionality
- Generates SDH frames for STM-0/1/4
- The core may be dynamically switched between SDH rates
- Scrambles the SDH frames
- Inserts regenerator section overhead and calculates B1 values
- Inserts multiplex section overhead and calculates B2 values
- Generates all AU pointers (up to 12 for VC3 over STM-4)
- Inserts VC3, VC4, and VC4-4c, channelised and single-channel
- All legal combinations of VCs are supported
- VC settings may be dynamically reconfigured on a per VC basis
- Generates B3 values for all VCs
- Inserts higher order path overhead
Block Diagram
Figure 1 shows a block diagram of the function.
 Click for full detail (53 KB)
Description
The Aliathon STM-0/1/4 (STS-1/3/12) Framer core provides a flexible, resource-efficient, programmable logic based solution for SONET/SDH interfaces. It supports both concatenated payloads (e.g., VC4-4c over STM-4) and channelized (e.g., multiple VC3s over STM-1). The core supports all of the specified rates and may be dynamically switched to any of those rates. The core is supported for Stratix® II, Stratix GX, and Cyclone™ FPGAs.
Device Utilization & Performance
Table 1 lists the typical device utilization for the megafunction.
| Table 1. Typical Device Utilization for the Megafunction |
| Target Device |
Speed Grade |
Utilization |
Performance
(fMAX) |
Parameter
Setting |
| LEs (1) |
ESBs (2) |
| Cyclone |
-7 |
1,053 |
- |
90+ MHz |
Contact Aliathon |
| Stratix |
-7 |
1,065 |
- |
90+ MHz |
Contact Aliathon |
| Stratix II |
-5 |
549 |
- |
100+ MHz |
Contact Aliathon |
Notes:
-
LEs = Logic elements. The LE count for Stratix II devices is based on the number of adaptive look-up tables (ALUTs) used for the design as reported by the Quartus® II software.
-
ESBs = Embedded system blocks
Contact Information
For additional information, contact Aliathon at:
Evans Business Centre
Pitreavie Court
Dunfermline
Fife KY11 8UU
United Kingdom
Tel: +44 (0) 1383 737736
Fax: +44 (0) 1383 749501
E-mail: info@aliathon.com
URL: www.aliathon.com
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