HYB18M512160BF-7.5 QIMONDA [Qimonda AG], HYB18M512160BF-7.5 Datasheet - Page 11

• Manufacturer Part Number: HYB18M512160BF-7.5
• Description: DRAMs for Mobile Applications 512-Mbit DDR Mobile-RAM RoHS compliant
• Manufacturer: QIMONDA [Qimonda AG]

3) Current state definitions:
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
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
8) A WRITE command may be applied after the completion of the Read burst; otherwise, a BURST TERMINATE command
9) Requires appropriate DM masking.
Internet Data Sheet
Idle:
Row Active:
Read:
Write:
Read with AP
Enabled:
Write with AP
Enabled:
3a. The Read with Auto Precharge Enabled or Write with Auto Precharge Enabled states can each be broken into two
only.
or Writes with Auto Precharge disabled.
must be used to end the Read burst prior to issuing a WRITE command.
parts: the access period and the precharge period. For Read with Auto Precharge, the precharge period is defined as
if the same burst was executed with Auto Precharge disabled and then followed with the earliest possible
PRECHARGE command that still accesses all of the data in the burst. For Write with Auto Precharge, the precharge
period begins when t
registration of the command and ends where the precharge period (or t
Read with Auto Precharge Enabled or Write with Auto Precharge Enabled states, ACTIVE, PRECHARGE, READ and
WRITE commands to the other bank may be applied; during the access period, only ACTIVE and PRECHARGE
commands to the other bank may be applied. In either case, all other related limitations apply (e.g. contention
between READ data and WRITE data must be avoided).
The bank has been precharged, and
A row in the bank has been activated, and
accesses are in progress.
terminated.
A WRITE burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
terminated.
see following text.
see following text.
A READ burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
WR
ends, with t
WR
measured as if Auto Precharge was disabled. The access period starts with
t
RP
11
has been met.
t
RCD
has been met. No data bursts / accesses and no register
RP
) begins. During the precharge period of the
512-Mbit DDR Mobile-RAM
HY[B/E]18M512160BF
Functional Description
07092007-3E44-UTNM
Rev.1.80, 2006-11