The FM550 is an I/O module equipped with two external mini-SAS x4 connectors. I/O FMCs of this sort are typically used to provide inter-module connectivity via the front-panels of carrier cards fitted with similar interfaces, or fan-out to multiple external devices such as mini-SAS drives.
Eight full-duplex high-speed serial lanes connect through the DP[0:7]_M2C/C2M lines of the HPC FMC connector to the FPGA of the carrier card. The mini-SAS connector is designed for signalling up to 10Gbps, contingent upon support of this rate by the interfacing FPGA device.
Any FPGA-supported protocol for implementation on one to four SerDes lanes may be utilized, with typical examples being external PCIe, XAUI, SRIO, SerialLite II, Aurora, SATA or SAS.
A low-jitter oscillator is fitted to the FM550, suitable for use as a reference clock source. The default value of the oscillator is 125MHz, but different values maybe requested upon ordering.
When matched with a suitable FMC carrier card, the Aurora Rocket IO Firmware Reference Design can be used to accelerate development of a multi-card front-panel interconnectivity design.
FRONT PANEL mini-SAS CHARACTERISTICS
- 2x SFF-8088 interfaces
- 4x lanes per interface
- Compliant with mini-SAS pin-out
- Designed for up to 10Gbps operation
- LVDS signalling levels
- Default frequency: 125MHz
- Total stability: ±31.5ppm max
- Supplied on FMC GBTCLK0
HPC FMC INTERFACE
- 8x high-speed serial lanes on DP[0:7]_M2C/C2M
- 2x loopbacks on DP[8:9]_C2M/M2C
- 17x loopbacks on LA[33:0]
- 12x loopbacks on HA[23:0]
- 11x loopbacks on HB[21:0]