HYB18L256160B QIMONDA [Qimonda AG], HYB18L256160B Datasheet - Page 44

• Manufacturer Part Number: HYB18L256160B
• Description: DRAMs for Mobile Applications 256-Mbit Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

2.4.10.1
The deep power down mode is an unique function on Low Power SDRAM devices with extremely low current consumption.
Deep power down mode is entered using the BURST TERMINATE command (cf.
internal voltage generators inside the device are stopped and all memory data is lost in this mode. To enter the deep power
down mode all banks must be precharged.
The deep power down mode is asynchronously exited by asserting CKE HIGH. After the exit, the same command sequence
as for power-up initialization, including the 200µs initial pause, has to be applied before any other command may be issued (cf.
Figure 3
2.5
This chapter contains the function truth tables.
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, see
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.
Rev. 1.73, 2006-09
01302004-CZ2R-J9SE
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.
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
positive clock edge during these states, see
and
Figure
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
CS
DEEP POWER DOWN
4).
Function Truth Tables
X
H
L
L
L
L
H
H
L
H
H
L
H
H
H
L
H
RAS CAS
Table 17
X
H
H
L
L
H
L
L
H
L
L
H
H
L
L
H
H
X
H
H
H
L
L
H
L
L
H
L
L
L
H
L
L
L
WE
Table 19
Command / Action
DESELECT (NOP / continue previous operation)
NO OPERATION (NOP / continue previous operation)
ACTIVE (select and activate row)
AUTO REFRESH
MODE REGISTER SET
PRECHARGE
READ (select column and start READ burst)
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
Table
20, see also
44
Table
t
RC
has been met (if the previous state was self refresh).
Current State Bank n - Command to Bank n
18.
Figure
HY[B/E]18L256160B[C/F]L-7.5
35) except that CKE is LOW. All
256-Mbit Mobile-RAM
TABLE 16
Note
1)2)3)4)5)6)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
Data Sheet
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
6)
6)
7)
7)
6)
6)
6)
6)
6)
6)
6)
6)
6)
6)
6)
6)
,
,
,
,
,
,
,
,
,
,
,
,
8)
9)
9)
10)
9)
9)
10)
11)
9)
9)
10)
11)