HYB18M512160BF-6 Datasheet, PDF (9/24 Pages) Qimonda AG – DRAMs for Mobile Applications 512-Mbit DDR Mobile-RAM RoHS compliant

HY[B/E]18M512160BF
512-Mbit DDR Mobile-RAM
Functional Description
Table 6 Current State Bank n - Command to Bank n
Current State CS RAS CAS WE Command / Action
Notes
Any
H X X X DESELECT (NOP / continue previous operation)
1)2)3)4)5)6)
L H H H NO OPERATION (NOP / continue previous operation) ^{1) to 6)}
Idle
L L H H ACTIVE (select and activate row)
1) to 6)
L L L H AUTO REFRESH
1) to 7)
L L L L MODE REGISTER SET
1) to 7)
Row Active
L H L H READ (select column and start Read burst)
1) to 6), 8)
L H L L WRITE (select column and start Write burst)
1) to 6), 8)
L L H L PRECHARGE (Deactivate row in bank or banks)
1) to 6), 9)
Read
L H L H READ (truncate Read and start new Read burst)
1) to 6), 8)
(Auto-
Precharge
Disabled)
L H L L WRITE (truncate Read and start new Write burst)
L L H L PRECHARGE (truncate Read and start Precharge)
L H H L BURST TERMINATE
1) to 6), 8), 10)
1) to 6), 9)
1) to 6), 11)
Write
(Auto-
Precharge
L H L H READ (truncate Write and start Read burst)
1) to 6), 8), 12)
L H L L WRITE (truncate Write and start Write burst)
1) to 6), 8)
L
L
H
L PRECHARGE (truncate Write burst, start Precharge)
1) to 6), 9),12)
1) This table applies when CKEn-1 was HIGH and CKEn is HIGH (see Table 5) and after t_XP or t_XSR has been met (if the
previous state was power-down or self refresh).
2) This table is bank-specific, except where noted, i.e., the current state is for a specific bank and the commands shown are
those allowed to be issued to that bank when in that state. Exceptions are covered in the notes below.
3) Current state definitions:
Idle:
Row Active:
AThreowbainnkthheabsabnekehnapsrbeecheanragcetdiv,aatnedd,^tRa^Pndhat_R^s_C^b_D^{eheansmbeeet.n} 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.
4) The following states must not be interrupted by a command issued to the same bank. DESELECT or NOP commands, or
allowable commands to the other bank should be issued on any clock edge occurring during these states. Allowable
commands to the other bank are determined by its current state and according to Table 7.
Precharging: Starts with registration of a PRECHARGE command and ends when t_RP is met. Once t_RP is met, the bank
is in the “idle” state.
Row Activating: Starts with registration of an ACTIVE command and ends when t_RCD is met. Once t_RCD is met, the bank
is in the “row active” state.
Read with AP
Enabled:
Write with AP
Enabled:
Starts with
met. Once
registration of
t_RP is met, the
a READ command with Auto
bank is in the idle state.
Precharge
enabled
and
ends
when
t_RP
has
been
Starts with
met. Once
registration of
t_RP is met, the
a WRITE command with
bank is in the idle state.
Auto
Precharge
enabled
and
ends
when
t_RP
has
been
5) The following states must not be interrupted by any executable command; DESELECT or NOP commands must be applied
on each positive clock edge during these states.
Refreshing:
Starts with registration of an AUTO REFRESH command and ends when t_RC is met. Once t_RC is met, the
DDR Mobile-RAM is in the “all banks idle” state.
Accessing Mode
Register:
Precharging All:
Starts with registration of a MODE REGISTER
t_MRD is met, the DDR Mobile-RAM is in the “all
Starts with registration of a PRECHARGE ALL
SET command and ends when t_MRD has been met. Once
banks idle” state.
command and ends when t_RP is met. Once t_RP is met, all
banks are in the idle state.
Internet Data Sheet
9
Rev.1.80, 2006-11
07092007-3E44-UTNM