HYB18M1G320BF Datasheet, PDF (47/62 Pages) Qimonda AG – DRAMs for Mobile Applications 1-Gbit x32 DDR Mobile-RAM

Data Sheet
HY[B/E]18M1G320BF
1-Gbit DDR Mobile-RAM
TABLE 19
Current State Bank n - Command to Bank m (different bank)
Current State CS RAS CAS WE Command / Action
Note
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 m
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 (truncate Read and start new Read burst)
L
H
L
L
WRITE (truncate Read 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 (truncate Write and start Read burst)
L
H
L
L
WRITE (truncate Write and start new Write burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)9)
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)
L
H
L
H
READ (truncate Read and start new Read burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
L
H
L
L
WRITE (truncate Read and start Write burst)
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 (with Auto- L
L
H
H
ACTIVE (select and activate row)
Precharge)
L
H
L
H
READ (truncate Write and start Read burst)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
L
H
L
L
WRITE (truncate Write and start new Write burst)
1)2)3)4)5)6)7)
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 (see Table 17) and after t_XP or t_XSR has been met (if the previous state was
power-down or 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 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).
Rev.1.00, 2007-03
47
02022006-J7N7-GYFP