Foxconn A7GM-S User Manual page 42

► tRP (Precharge Command Period)
This item allows you to select the row precharge time (in clock cycles).
► tRTP (Internal Read to Precharge Command Delay)
Internal READ Command to PRECHARGE Command delay
► tRAS (Active-to-Precharge Delay)
This item allows you to set the minimum RAS# active time (in clock cycles).
► tRC (Active-to-Active/Auto-Refresh Command Period)
This item allows you to set the row cycle time (in clock cycles). tRC = tRAS + tRP.
► tWR (Write Recovery)
This item allows you to select the write recovery time (in clock cycles).
► tRRD (Active-to-Active of a Different Bank)
This item allows you to select a delay time (in clock cycles) between the RAS# and RAS#
strobe signals.
► TrwtTO (Read-to-Write Turnaround for Data. Optional only if CPU supports)
This timing parameter ensures read-to-write data-bus turnaround.
► Twrrd (Write to Read DIMM Termination Turn-around. Optional only if CPU supports)
This timing parameter accounts for termination timing when a write is followed by a read to a
different DIMM.
► tWTR (Internal Write to Read Command Delay)
This item allows you to select a delay time (in clock cycles) between sending the last data from
a write operation to the memory and issuing a read command.
► Twrwr (Write to Write Timing. Optional only if CPU supports)
This timing parameter accounts for turn-around timing when a write is followed by a write to a
different DIMM.
► Trdrd (Read to Read Timing. Optional only if CPU supports)
This timing parameter accounts for turn-around and termination timing when a read is followed
by a read to a different chip select.
► tRFC0, 1, 2, 3 (Auto-Refresh-to-Active/Auto-Refresh Command Period)
Refresh to Refresh or Refresh to Active command interval.
Trfc3: auto-refresh row cycle time for logical DIMM 3
Trfc2: auto-refresh row cycle time for logical DIMM 2
Trfc1: auto-refresh row cycle time for logical DIMM 1
Trfc0: auto-refresh row cycle time for logical DIMM 0
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