參數(shù)資料
型號(hào)： MT48LC1M16A1S
廠商： Micron Technology, Inc.
英文描述： SYNCHRONOUS DRAM
中文描述： 同步DRAM
文件頁(yè)數(shù)： 28/51頁(yè)
文件大?。?/td> 1480K
代理商： MT48LC1M16A1S
16Mb: x16 SDRAM
16MSDRAMx16.p65
–
Rev. 8/99
Micron Technology, Inc., reserves the right to change products or specifications without notice.
1999, Micron Technology, Inc.
28
16Mb: x16
SDRAM
TRUTH TABLE 4 – CURRENT STATE BANK
n
- COMMAND TO BANK
m
(Notes: 1-6; notes appear below and on next page)
CURRENT STATE
Any
CS# RAS# CAS# WE#
H
X
L
H
X
X
L
L
L
H
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
H
L
L
COMMAND (ACTION)
COMMAND INHIBIT (NOP/Continue previous operation)
NO OPERATION (NOP/Continue previous operation)
Any command otherwise allowed to 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
NOTES
X
H
X
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
X
H
X
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
Idle
Row Activating,
Active or
Precharging
7
7
Read
(Auto
Precharge
Disabled)
Write
(Auto
Precharge
Disabled)
Read
(With Auto
Precharge)
7, 10
7, 11
9
7, 12
7, 13
9
7, 8, 14
7, 8, 15
9
Write
(With Auto
Precharge)
7, 8, 16
7, 8, 17
9
NOTE:
1. This table applies when CKE
was HIGH and CKE
n
is HIGH (see Truth Table 2) and after
t
XSR 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
or been terminated.
Write: A WRITE burst has been initiated, with AUTO PRECHARGE disabled, and has not yet terminated
or been terminated.
Read w/Auto
Precharge 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 will be in the idle state.
Write w/Auto
Precharge 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 will be in the idle state.
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