HYB18L512320BF-7.5 Datasheet, PDF (11/23 Pages) Qimonda AG – DRAMs for Mobile Applications 512-Mbit SDR Mobile-RAM

Internet Data Sheet
HY[B/E]18L512320BF-7.5
512-Mbit Mobile-RAM
10) May or may not be bank-specific; if multiple banks are to be precharged, each must be in a valid state for precharging.
11) Not bank-specific; BURST TERMINATE affects the most recent READ or WRITE burst, regardless of bank.
TABLE 8
Current State Bank n - Command to Bank m (different bank)
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)2)3)4)5)6)
Idle
X X X X Any command otherwise allowed to bank n
1)2)3)4)5)6)
Row Activating, L L H H ACTIVE (select and activate row)
Active, or
L H L H READ (select column and start READ burst)
Precharging
L
H
L
L
WRITE (select column and start WRITE burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
1)2)3)4)5)6)7)
L
L
H
L
PRECHARGE (deactivate row in bank or banks)
1)2)3)4)5)6)
Read (Auto-
L
L
H H ACTIVE (select and activate row)
Precharge
Disabled)
L H L H READ (select column and start READ burst)
L
H
L
L
WRITE (select column and start WRITE burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
1)2)3)4)5)6)7)8)
L
L
H
L
PRECHARGE (deactivate row in bank or banks)
1)2)3)4)5)6)
Write (Auto-
L
L
H H ACTIVE (select and activate row)
Precharge
Disabled)
L H L H READ (select column and start READ burst)
L
H
L
L
WRITE (select column and start WRITE burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
1)2)3)4)5)6)7)
L
L
H
L
PRECHARGE (deactivate row in bank or banks)
1)2)3)4)5)6)
Read(with Auto- L L H H ACTIVE (select and activate row)
Precharge)
1)2)3)4)5)6)
L H L H READ (select column and start READ burst)
1)2)3)4)5)6)7)9)
L
H
L
L
WRITE (select column and start WRITE burst)
1)2)3)4)5)6)7)8)9)
L
L
H
L
PRECHARGE (deactivate row in bank or banks)
1)2)3)4)5)6)
Write(with Auto- L L H H ACTIVE (select and activate row)
Precharge)
L H L H READ (select column and start READ burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)9)
L
H
L
L
WRITE (select column and start WRITE burst)
1)2)3)4)5)6)7)9)
L
L
H
L
PRECHARGE (deactivate row in bank or banks)
1)2)3)4)5)6)
1) This table applies when CKEn-1 was HIGH and CKEn is HIGH and after t_RC has been met (if the previous state was Self Refresh).
2) This table describes alternate bank operation, except where noted, i.e., the current state is for bank n and the commands shown are those
allowed to be issued to bank m (assuming that bank m is in such a state that the given command is allowable). Exceptions are covered in
the notes below.
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 orbeen 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) Requires appropriate DQM masking.
Rev.1.22, 2007-08
11
03292006-D7GM-ZBSS