Technical Information

Product description

FPGA Drive is an adapter that allows M.2 PCIe SSDs to be connected to FPGAs. The adapter uses the FPGA Mezzanine Card (FMC) form factor for connection with FPGA and MPSoC development boards via the FMC connector. It has 2x M.2 sockets and can carry M.2 PCIe SSDs of length 42mm, 60mm, 80mm or 110mm. Each M.2 socket has its own independent connection to the FPGA for maximum throughput and can support a 4-lane PCIe connection up to Gen3.

Power supply

All power to the FPGA Drive FMC is supplied through the carrier’s FMC connector. The FPGA Drive FMC makes use of the FMC’s 3.3VDC supply to power one of the SSDs, and it has a switching regulator to power the other SSD using the FMC’s 12VDC supply.

The adjustable voltage supply (VADJ), which is supplied by all standard FMC carriers, can be set to any voltage between 1.8V and 3.3V. The FPGA Drive FMC’s onboard FRU EEPROM specifies a 1.8V VADJ for all carriers that have a power management system.

Interface with FPGA

The adapter has a high pin-count (HPC) FMC connector (SamtecĀ ASP-134488-01) which can be mated with either an LPC or HPC FMC. The pinout conforms to the Vita 57.1 FPGA Mezzanine Card (FMC) Standard. When mated with a LPC FMC connector, only one SSD is connected using 1-lane PCIe. When mated with a HPC FMC connector, both SSDs can be used, each with a 4-lane PCIe connection (depends on the carrier board used, please see compatibility table below).

M.2 sockets

TE-Connectivity M.2 form factor socket, part number 1-2199230-6, is designed to mate with M-key M.2 PCI Express SSDs.

100MHz Clock Oscillators

Micrel 100MHz MEMs based clock oscillator, part number DSC557-0344SI1, generates two precision 100MHz clocks: one HCSL and the other LVDS. The HCSL clock feeds the SSD while the LVDS clock feeds the FPGA. FPGA Drive FMC uses two of these devices, one for each SSD.

Dimensions

The FPGA Drive adapter is 69mm x 141.5mm. FPGA Drive FMC does not conform to the mechanical specifications of the Vita 57.1 standard due to the length of M.2 modules.

FPGA Drive FMC Rev-B Mech drawing (version for 1x SSD – phased out)
FPGA Drive FMC Rev-D Mech drawing (version for 2x SSDs)

Compatibility

FPGA Drive FMC is pin-compatible to all carriers that conform to the Vita 57.1 standard. Compatible carriers include the KC705, VC707, VC709, KCU105 and ZCU106. FPGA Drive FMC can only be used on FMC carriers with transceiver-loaded FMCs. If you are not sure if FPGA Drive is compatible with your FPGA board, please contact us.

Schematics

FPGA Drive FMC Schematics RevB-2 (version for 1x SSD – phased out)

FPGA Drive FMC Schematics RevD-1 (version for 2x SSDs)

Carrier Compatibility Table

CarrierFirst SSDSecond SSD
PicoZed 7015 and PicoZed FMC Carrier Card V2LPC: 1-lane, Gen1Not supported
PicoZed 7030 and PicoZed FMC Carrier Card V2LPC: 1-lane, Gen2Not supported
KC705HPC: 4-lanes Gen2
LPC: 1-lane Gen2
HPC: Not supported
LPC: Not supported
VC707HPC1: 4-lanes Gen2
HPC2: 4-lanes Gen2
HPC1: 4-lanes Gen2
HPC2: 4-lanes Gen2
VC709HPC: 4-lanes Gen3HPC: 4-lanes Gen3
ZC702Not supported (no GTX)Not supported (no GTX)
ZC706HPC: 4-lanes Gen2
LPC: 1-lane Gen2
Not supported (Zynq-7000 devices only have 1 PCIe block)
KCU105HPC: 4-lanes Gen3
LPC: 1-lane Gen3
HPC: 4-lanes Gen3
LPC: Not supported
ZCU102 (no example design provided)HPC0: 4-lanes Gen3
HPC1: 4-lanes Gen3
(using soft IP)
HPC0: 4-lanes Gen3
HPC1: 4-lanes Gen3
(using soft IP)
ZCU106HPC0: 4-lanes Gen3
HPC1: 1-lane Gen3
HPC0: 4-lanes Gen3
HPC1: Not supported

  1. FPGA Drive is not compatible with the ZC702 board as it does not have any gigabit transceivers.
  2. FPGA Drive FMC is compatible with ZCU102 board, however it must connect to a soft PCIe IP and we do not provide any example design for this at the present time.

FMC Transceiver Assignments

The table below outlines the assignment of the FMC transceivers (DP0 to DP7) to the 2x SSDs. Each SSD is connected to 4x gigabit transceivers. The first SSD (SSD1) connects to transceivers DP0-DP3, while the second SSD (SSD2) connects to transceivers DP4-DP7. Note that all LPC connectors have a maximum of 1x gigabit transceiver (DP0), therefore they can only support a 1-lane PCIe connection to SSD1, and they cannot support SSD2. Also note that not all carriers with HPC connectors have all the transceivers connected.

FMC Gigabit TransceiverSSD1 PCIe LanesSSD2 PCIe Lanes
DP0Lane 0
DP1Lane 1
DP2Lane 2
DP3Lane 3
DP4Lane 0
DP5Lane 1
DP6Lane 2
DP7Lane 3

For more information, please contact us.