ASROCK Z87E-ITX User Manual download pdf (Page 70)

Z87E-ITX

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English

Command Rate (CR)

e delay between when a memory chip is selected and when the rst active command can

be issued.

Write Recovery Time (tWR)

e amount of delay that must elapse aer the completion of a valid write operation,

before an active bank can be precharged.

Refresh Cycle Time (tRFC)

e number of clocks from a Refresh command until the rst Activate command to

the same rank.

RAS to RAS Delay (tRRD)

e number of clocks between two rows activated in dierent banks of the same

rank.

Write to Read Delay (tWTR)

e number of clocks between the last valid write operation and the next read

command to the same internal bank.

Read to Precharge (tRTP)

e number of clocks that are inserted between a read command to a row pre-

charge command to the same rank.

Four Activate Window (tFAW)

e time window in which four activates are allowed the same rank.

CAS Write Latency (tCWL)

Congure CAS Write Latency.

tREFI

Congure refresh cycles at an average periodic interval.

tCKE

Congure the period of time the DDR3 initiates a minimum of one refresh

command internally once it enters Self-Refresh mode.

tRDRD

Congure between module read to read delay.

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ASROCK Z87E-ITX User Manual Page 70