Work-In-Progress: Design being tested.
Designed to test simultaneous PCIe Host and Endpoint operation with the Innova-2.
There are two PCIE4 blocks in the column of the Innova-2's OpenCAPI Quads.
The GTY Transceivers connected to the OpenCAPI Connector are in a column that does not contain the Configuration Block so it is impossible for the FPGA to be programmed within the 100ms PCIe power-up time limit. Motherboard boot must be delayed to allow the FPGA to configure itself before PCIe devices are enumerated. This can be accomplished by toggling the POWER button, then pressing and holding the RESET button for a second before releasing it. Or, connect a capacitor across the reset pins of an ATX motherboard's Front Panel Header.
OpenCAPI-compatible SlimSAS 8x uses a Host version of the OpenCAPI Carrier pinout from the ADM-PCIE-9V5 User Manual (Pg15-19of38).
TODO
The innova2_xdma_opencapi project includes the ability to test I2C.
All differential pairs are length-matched to within 1mm intra-pair (N-to-P) and each group of differential pairs (e.g., TX0-to-TX3) is similarly matched to within 1mm.
| Designator(s) | Part Number | Quantity | Value | Footprint | Availability |
|---|---|---|---|---|---|
| U1 | SY75572LMG | 1 | N/A | QFN-16-1EP_3x3mm_P0.5mm | DigiKey |
| U2 | DSC1124BI2-100-0000 | 1 | N/A | OSC_SMD_IDT_JS6-6_5.0x3.2mm_P1.27mm | DigiKey |
| J1 | U10A474240T | 1 | N/A | SlimSAS_8x_RA_U10-A474 | DigiKey |
| J2 | PPPC061LFBN-RC | 1 | N/A | PinHeader_1x06_P2.54mm_Vertical | DigiKey |
| J4 | 2-2387405-2 | 1 | N/A | PCIe x4 Straddle Mount w/ Open End | DigiKey |
| JP1 | 2PH1-02-UA | 1 | N/A | PinHeader_1x02_P2.00mm_Vertical | DigiKey |
| R31 to R36 | RT0402FRE0733RL | 6 | 33-Ohm | Resistor_SMD_R_0402_1005Metric | DigiKey |
| R51 to R56 | RT0402FRE0749R9L | 6 | 49.9-Ohm | Resistor_SMD_R_0402_1005Metric | DigiKey |
| R1 | RT0402FRE07475RL | 1 | 475-Ohm | Resistor_SMD_R_0402_1005Metric | DigiKey |
| R2, R5 | RT0402FRE0751KL | 2 | 51k-Ohm | Resistor_SMD_R_0402_1005Metric | DigiKey |
| L1, L2 | BLM15PX601SN1D | 2 | 600@100MHz | Resistor_SMD_R_0402_1005Metric | DigiKey |
| C4 | KGM05AR71C103KH | 1 | 0.01uF | Capacitor_SMD_C_0402_1005Metric | DigiKey |
| C1, C2, C3 | KGM05AR51A104KH | 3 | 0.1uF | Capacitor_SMD_C_0402_1005Metric | DigiKey |
| C5 | CL21B105KAFNNNE | 1 | 1uF | Capacitor_SMD_C_0805_2012Metric | DigiKey |
| J7, J8 | 2337019-1 | 2 | U.FL(UMCC) | U.FL_Hirose | DigiKey |
| Jumper | SPN02SYBN-RC | 1 | N/A | 2mm Shunt | DigiKey |
Optional: TC74Ax-3-3VAT I2C Temperature Sensor for testing I2C.
Use needle-nosed pliers to remove the PCIe x4 Connector's mounting post.
Three wire jumpers are needed to connect 3V3==3V3_PCIe, nPERST==RST, and nPRSNT1==nPRSNT2_x4.
4-Layer PCB stackup taken from JLCPCB.
Differential Impedance parameters were calculated using the DigiKey Online Calculator.
