參數(shù)資料
型號(hào)： WED9LC6816V1610BI
廠商： WHITE ELECTRONIC DESIGNS CORP
元件分類： 存儲(chǔ)器
英文描述： SPECIALTY MEMORY CIRCUIT, PBGA153
封裝： 14 X 22 MM, MO-163, BGA-153
文件頁(yè)數(shù)： 2/26頁(yè)
文件大小： 324K
代理商： WED9LC6816V1610BI
WED9LC6816V
10
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
September, 2003
Rev. 1
White Electronic Designs Corp. reserves the right to change products or specications without notice.
SDRAM CURRENT STATE TRUTH TABLE
Current
State
Command
Action
Notes
SDCE#
SDRAS#
SDCAS#
SDWE#
A12 & A13
(BA)
A11-A0
Description
Idle
L
OP Code
Mode Register Set
Set the Mode Register
1
L
H
X
Auto or Self Refresh
Start Auto
1
L
H
L
X
Precharge
No Operation
L
H
BA
Row Address
Bank Activate
Activate the specied bank and row
L
H
L
BA
Column
Write w/o Precharge
ILLEGAL
2
L
H
L
H
BA
Column
Read w/o Precharge
ILLEGAL
1
L
H
L
X
Burst Termination
No Operation
1
L
H
X
No Operation
H
X
Device Deselect
No Operation
Row Active
L
OP Code
Mode Register Set
ILLEGAL
L
H
X
Auto or Self Refresh
ILLEGAL
L
H
L
X
Precharge
3
L
H
BA
Row Address
Bank Activate
ILLEGAL
1
L
H
L
BA
Column
Write
Start Write; Determine if Auto
Precharge
4,5
L
H
L
H
BA
Column
Read
Start Read; Determine if Auto
Precharge
4,5
L
H
L
X
Burst Termination
No Operation
L
H
X
No Operation
H
X
Device Deselect
No Operation
Read
L
OP Code
Mode Register Set
ILLEGAL
L
H
X
Auto or Self Refresh
ILLEGAL
L
H
L
X
Precharge
Terminate Burst; Start the Precharge
L
H
BA
Row Address
Bank Activate
ILLEGAL
2
L
H
L
BA
Column
Write
Terminate Burst; Start the Write cycle
5,6
L
H
L
H
BA
Column
Read
Terminate Burst; Start a new Read
cycle
5,6
L
H
L
X
Burst Termination
Terminate the Burst
L
H
X
No Operation
Continue the Burst
H
X
Device Deselect
Continue the Burst
Write
L
OP Code
Mode Register Set
ILLEGAL
L
H
X
Auto or Self Refresh
ILLEGAL
L
H
L
X
Precharge
Terminate Burst; Start the Precharge
L
H
BA
Row Address
Bank Activate
ILLEGAL
2
L
H
L
BA
Column
Write
Terminate Burst; Start a new Write
cycle
5,6
L
H
L
H
BA
Column
Read
Terminate Burst; Start the Read cycle
5,6
L
H
L
X
Burst Termination
Terminate the Burst
L
H
X
No Operation
Continue the Burst
H
X
Device Deselect
Continue the Burst
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