HYB18L512320BF-7.5 QIMONDA [Qimonda AG], HYB18L512320BF-7.5 Datasheet - Page 10

• Manufacturer Part Number: HYB18L512320BF-7.5
• Description: DRAMs for Mobile Applications 512-Mbit SDR Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

2.3
1) This table applies when CKEn-1 was HIGH and CKEn is HIGH and after
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
3) Current state definitions:Idle:The bank has been precharged, and
4) The following states must not be interrupted by a command issued to the same bank. DESELECT or NOP commands, or allowable
5) The following states must not be interrupted by any executable command; DESELECT or NOP commands must be applied on each
6) All states and sequences not shown are illegal or reserved.
7) Not bank-specific; requires that all banks are idle and no bursts are in progress.
8) Same as NOP command in that state.
9) READs or WRITEs listed in the Command/Action column include READs or WRITEs with Auto Precharge enabled and READs or WRITEs
Rev.1.22, 2007-08
03292006-D7GM-ZBSS
Current State
Any
Idle
Row Active
Read (Auto-
Precharge
Disabled)
Write (Auto-
Precharge
Disabled)
to be issued to that bank when in that state. Exceptions are covered in the notes below.
t
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.
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
when
when
command with Auto Precharge enabled and ends when
Enabled:Starts with registration of a WRITE command with Auto Precharge enabled and ends when
the bank is in the idle state.
positive clock edge during these states. Refreshing:Starts with registration of an AUTO REFRESH command and ends when
Once
and ends when
a PRECHARGE ALL command and ends when
with Auto Precharge disabled.
RCD
has been met. No data bursts/accesses and no register accesses are in progress.Read:A READ burst has been initiated, with Auto
t
t
t
RP
RCD
RC
is met. Once
ismet, the SDRAM is in the “all banks idle” state.Accessing MR:Starts with registration of a MODE REGISTER SET command
is met. Once
t
MRD
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
CS
Function Truth Tables
has beenmet. Once
t
RP
t
RCD
X
H
L
L
L
L
H
H
L
H
H
L
H
H
H
L
H
RAS CAS
is met, the bank is in the “idle” state.Row Activating:Starts with registration of an ACTIVE command and ends
is met, the bank is in the “row active” state.Read with AP Enabled:Starts with registration of a READ
X
H
H
L
L
H
L
L
H
L
L
H
H
L
L
H
H
t
X
H
H
H
L
L
H
L
L
H
L
L
L
H
L
L
L
MRD
WE
is met, the SDRAM is in the “all banks idle” state.Precharging All:Starts with registration of
t
RP
Command / Action
DESELECT (NOP / continue previous operation)
NO OPERATION (NOP / continue previous operation)
ACTIVE (select and activate row)
AUTO REFRESH
MODE REGISTER SET
PRECHARGE
WRITE (select column and start WRITE burst)
PRECHARGE (deactivate row in bank or banks)
READ (select column and start new READ burst)
WRITE (select column and start new WRITE burst)
PRECHARGE (truncate READ burst, start precharge)
BURST TERMINATE
READ (select column and start READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE (truncate WRITE burst, start precharge)
BURST TERMINATE
READ (select column and start READ burst)
is met. Once
Table
t
RP
8.Precharging:Starts with registration of a PRECHARGE command and ends
has been met. Once
10
t
t
RP
RP
has been met.Row Active:A row in the bank has been activated, and
is met, all banks are in the idle state.
t
RC
has been met (if the previous state was self refresh).
Current State Bank n - Command to Bank n
t
RP
is met, the bank is in the idle state.Write with AP
t
RP
HY[B/E]18L512320BF-7.5
has been met. Once
512-Mbit Mobile-RAM
Internet Data Sheet
TABLE 7
Notes
1)2)3)4)5)6)
1)2)3)4)5)6)
1)2)3)4)5)6)
1)2)3)4)5)6)7)
1)2)3)4)5)6)7)
1)2)3)4)5)6)8)
1)2)3)4)5)6)9)
1)2)3)4)5)6)9)
1)2)3)4)5)6)10)
1)2)3)4)5)6)9)
1)2)3)4)5)6)9)
1)2)3)4)5)6)10)
1)2)3)4)5)6)11)
1)2)3)4)5)6)9)
1)2)3)4)5)6)9)
1)2)3)4)5)6)10)
1)2)3)4)5)6)11)
t
t
RP
RC
is met,
is met.