mt48h8m16lf Micron Semiconductor Products, mt48h8m16lf Datasheet - Page 30

• Manufacturer Part Number: mt48h8m16lf
• Description: 128mb 8 Meg X 16, 4 Meg X 32 Mobile Sdram
• Manufacturer: Micron Semiconductor Products

Table 17:
PDF: 09005aef832ff1ea / Source: 09005aef832ff1ac
sdr_mobile_sdram_cmd_op_timing_dia_fr5.08__4.fm - Rev. B 6/08 EN
(auto precharge
(auto precharge
Current State
precharging
precharge)
precharge)
activating,
(with auto
(with auto
active, or
disabled)
disabled)
Write
Write
Read
Read
Row
Any
Idle
Truth Table – Current State Bank n, Command to Bank m
Notes 1–6; notes appear below this table
Notes:
CS#
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
2. This table describes alternate bank operation, except where noted; i.e., the current state is
3. Current state definitions:
4. AUTO REFRESH, SELF REFRESH and LOAD MODE REGISTER commands may only be issued
1. This table applies when CKE
RAS# CAS#
t
for bank n and the commands shown can be issued to bank m (assuming that bank m is in
such a state that the given command is supported). Exceptions are covered in the notes
below.
Idle:
Row active:
Read:
Write:
Read w/auto-
precharge enabled:
Write w/auto-
precharge enabled:
when all banks are idle.
H
H
H
H
H
H
H
H
H
H
H
XSR has been met (if the previous state was self refresh).
X
X
L
L
L
L
L
L
L
L
L
L
X
H
X
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
WE#
X
H
X
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
Command (Action)
COMMAND INHIBIT (NOP/Continue previous operation)
NO OPERATION (NOP/Continue previous operation)
Any command otherwise supported for bank m
ACTIVE (Select and activate row)
READ (Select column and start READ burst)
WRITE (Select column and start WRITE burst)
PRECHARGE
ACTIVE (Select and activate row)
READ (Select column and start new READ burst)
WRITE (Select column and start WRITE burst)
PRECHARGE
ACTIVE (Select and activate row)
READ (Select column and start READ burst)
WRITE (Select column and start new WRITE burst)
PRECHARGE
ACTIVE (Select and activate row)
READ (Select column and start new READ burst)
WRITE (Select column and start WRITE burst)
PRECHARGE
ACTIVE (Select and activate row)
READ (Select column and start READ burst)
WRITE (Select column and start new WRITE burst)
PRECHARGE
The bank has been precharged, and
A row in the bank has been activated, and
data bursts/accesses and no register accesses are in progress.
has not yet terminated or been terminated.
A WRITE burst has been initiated, with auto precharge disabled, and
has not yet terminated or been terminated.
Starts with registration of a READ command with auto precharge
enabled and ends when
will be in the idle state.
Starts with registration of a WRITE command with auto precharge
enabled and ends when
will be in the idle state.
A READ burst has been initiated, with auto precharge disabled, and
128Mb: 8 Meg x 16, 4 Meg x 32 Mobile SDRAM
n-1
30
was HIGH and CKE
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
t
RP has been met. After
RP has been met. After
n
is HIGH (Table 18 on page 32) and after
t
RP has been met.
©2008 Micron Technology, Inc. All rights reserved.
t
RCD has been met. No
t
t
RP is met, the bank
RP is met, the bank
Operations
Preliminary
7, 8, 14
7, 8, 15
7, 8, 16
7, 8, 17
Notes
7, 10
7, 11
7, 12
7, 13
7
7
9
9
9
9