xFaceMAC32
xFaceMAC32 is an Ethernet media-access controller. It receives and transmits Gigabit traffic concurrently (full-duplex). The xFaceStream32 interface allows direct network access for software and for hardware.
Application
Application of xFaceMAC32 as network interface for software-defined radios
Features
- Functionality
- Gigabit Ethernet IEEE 802.3 compatible
- 1 Gbps receiving of traffic of any shape
- 1 Gbps sending of data up to 8k packet size
- Verification and generation of CRC-32 checksum (FCS calculation)
- Extraction of received Ethernet headers
- Up to four data sources for transmission (multiplexing)
- DMA like data transfer
- No CPU interaction needed for transferring data to / from MAC
- Interfaces
- GMII interface for phyical device
- external PHY for 1000Base-T network (RJ45 connector)
- PCS/PMA for 1000Base-X (SFP modules)
- xFaceStream32 interface
- High throughput, low latency
- Optimization
- Optimized for Xilinx FPGAs Spartan-6, Virtex-4, Virtex-5, Virtex-6
- Performance
- Throughput: 1 Gbps RX + 1 Gbps TX (full duplexI
- Latency GMII <-> xFaceStream32
- RX: 620+ ns (increases with packet size)
- TX: 120 ns
- Max. clock frequency
- Spartan-6: 165 MHz
- Virtex-6: 274 MHz
- Resources
- Spartan-6, Virtex-6: 8 BRAM (18k block RAM) and 870 slices
- Verified on
- Xilinx SP605 board (Xilinx Spartan-6)
| xFaceMAC32 | |||
|---|---|---|---|
| FPGA | slice | BRAM | f_max |
| Xilinx Spartan-3 XC3SD1800A | 557 of 16640 (3%) | 8 of 84 (9%) | 122.47 MHz |
| Xilinx Spartan-6 XC6SLX45T | 868 of 27288 (3%) | 8 of 116 (6%) | 165.70 MHz |
| Xilinx Virtex-4 XC4VLX25 | 570 of 10752 (5%) | 8 of 72 (11%) | 213.42 MHz |
| Xilinx Virtex-6 XC6VLX75T | 813 of 46560 (1%) | 4 of 156 (2%) | 274.03 MHz |
Table. Synthesis results on small Xilinx FPGAs: 8 BRAMs and 870 slices running at 165 MHz
Deliverables
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Contact
xFace e.U.
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