Timing abbreviations

t_CL – CAS latency
t_CR – Command rate
t_PTP – precharge to precharge delay
t_RAS – RAS active time
t_RCD – RAS to CAS delay
t_REF – Refresh period
t_RFC – Row refresh cycle time
t_RP – RAS precharge
t_RRD – RAS to RAS delay
t_RTP – Read to precharge delay
t_RTR – Read to read delay
t_RTW – Read to write delay
t_WR – Write recovery time
t_WTP – Write to precharge delay
t_WTR – Write to read delay
t_WTW – Write to write delay