Foxconn A85GM User Manual

Page 40

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)

This timing parameter ensures read-to-write data-bus turnaround.

► TwrrD (Write to Read DIMM Termination Turn-around)

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)

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)

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, (Auto-Refresh-to-Active/Auto-Refresh Command Period)

Refresh to Refresh or Refresh to Active command interval.
Trfc1: auto-refresh row cycle time for logical DIMM 1
Trfc0: auto-refresh row cycle time for logical DIMM 0