SNLU297 May   2021 DS320PR810

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  DS320PR810 5-Level I/O Control Inputs
    2. 2.2  DS320PR810 Modes of Operation
    3. 2.3  DS320PR810 SMBus or I2C Register Control Interface
    4. 2.4  DS320PR810 Equalization Control
    5. 2.5  DS320PR810 RX Detect State Machine
    6. 2.6  DS320PR810 DC Gain Control
    7. 2.7  DS320PR810 EVM Global Controls
    8. 2.8  DS320PR810EVM Downstream Devices Control
    9. 2.9  DS320PR810EVM Upstream Devices Control
    10. 2.10 Quick-Start Guide (Pin Mode)
    11. 2.11 Quick-Start Guide (SMBus Slave Mode)
  4. 3Test Setup and Results
  5. 4Schematics
  6. 5Board Layout
  7. 6Bill of Materials
  8. 7References

2.10 Quick-Start Guide (Pin Mode)

Check that the shunts are at the following positions as shown in Figure 1-1:

  1. The redrivers are configured to operate in Pin Mode (MODE pins tied to L0 using J1 header).

  2. RX_Detect state machine of all redrivers is enabled by leaving J2 open.
  3. The redrivers are enabled (PWDN pins tied to GND using J4 header). Alternatively, for PCIe applications, the PWDN pins may be driven by PCIe Present (PRSNT) signal by leaving J4 open and placing a shunt across pins 1 and 2 of J6.
  4. The board is configured for any PCIe bus width (PRSNT signal controls set as shown in Figure 1-1 using J7, J8, J9 and J10 headers).
  5. DC Gain of all redrivers is set to 0 dB by leaving J14 open for the downstream redrivers and by leaving J21 open for the upstream redrivers.
  6. EQ level of the RX CTLEs of all redrivers is set to 10 dB at 16 GHz by using J15 and J16 for the downstream redrivers and J22 and J23 for the upstream redrivers.
  7. If necessary, adjust EQ levels of the downstream redrivers, or upstream redrivers, or both, by arranging shunts on J15 and J16 for downstream redrivers and J22 and J23 for the upstream redrivers.
  8. Plug the EVM into a PCIe x16 server motherboard slot. Ensure the motherboard is powered down before installing the EVM or configured for hot-plug operation.
  9. Install a compatible PCIe endpoint card into the straddle connector of the EVM.
  10. Power-up the motherboard.