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 tRP has been met.
Row Active:
A row in the bank has been activated, and tRCD 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 tRP has been met. Once tRP 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 tRP has been met. Once tRP 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
QIMONDA [ QIMONDA AG ]
