GDDR5 Related Settings

DDR4 Report Presettings Window, DDR Settings tab.
  1. It support both idea IO power input and real IO power net assignment 2133Mbps, 2400Mbps, 2666Mbps and 3200Mbps.
  2. All of these settings are Vrefd training related setting follow JEDEC Spec JESD79-4 “Table 36 — DQ Internal Vref Specifications ”.

  3. Vrefc settings, 2 Options:

    1. Vrefc = 0.5 IO power

    2. External Vrefc, assign a net as Vrefc net, tools can automatic calculate the Vrefc voltage value according to your selection.

  4. dropdown menu for AC/DC Threshold selection, it also support user define values.

  5. Write/Read options:

    1. Write Mode

    2. Read Mode

Command, Address and control timing options:

  1. 1T. Means CA signal period is 1 time clock period.
  2. 2T. Means CA signal period is twice clock period.