HYB18M1G16 Datasheet, PDF (51/65 Pages) Qimonda AG – 1-Gbit x16 DDR Mobile-RAM

Data Sheet
HY[B/E]18M1G16[0/1]BF
1-Gbit DDR Mobile-RAM
3) Current state definitions:
Idle:
The bank has been precharged, and t_RP has been met.
Row Active:
A row in the bank has been activated, and t_RCD has been met. No data bursts / accesses and no register
accesses are in progress.
Read:
A READ burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
terminated.
Write:
A WRITE burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
terminated.
Read with AP Enabled:
Starts with registration of a READ command with Auto Precharge enabled and ends when t_RP has been met. Once t_RP is
met, the bank is in the idle state.
Write with AP Enabled:
Starts with registration of a WRITE command with Auto Precharge enabled and ends when t_RP has been met. Once t_RP is
met, the bank is in the idle state.
4) AUTO REFRESH, SELF REFRESH and MODE REGISTER SET commands may only be issued when all banks are idle.
5) A BURST TERMINATE command cannot be issued to another bank; it applies to the bank represented by the current state only.
6) All states and sequences not shown are illegal or reserved.
7) Reads or Writes listed in the Command/Action column include Reads or Writes with Auto Precharge enabled and Reads or Writes with
Auto Precharge disabled.
8) A WRITE command may be applied after the completion of the Read burst; otherwise, a BURST TERMINATE command must be used to
end the Read burst prior to issuing a WRITE command.
9) Requires appropriate DM masking.
Rev.1.0, 2007-03
51
10242006-Y557-TZXW