WED9LAPC2C16V4BC Просмотр технического описания (PDF) - White Electronic Designs => Micro Semi
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WED9LAPC2C16V4BC Datasheet PDF : 23 Pages
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WED9LAPC2C16V4BC
Current State
Write with
Auto Precharge
Precharging
Row Activating
Write Recovering
Write Recovering
with Auto
Precharge
SDRAM CURRENT STATE TRUTH TABLE (cont.)
Command
VCRAS VCCAS VCWE VCBS
VCADDR
Description
Action
Notes
L
L
L
L
L
H
L
H
H
L
H
L
H
H
H
H
L
L
L
L
L
H
L
H
H
L
H
L
H
H
H
H
L
L
L
L
L
H
L
H
H
L
H
L
H
H
H
H
L
L
L
L
L
H
L
H
H
L
H
L
H
H
H
H
L
L
L
L
L
H
L
H
H
L
H
L
H
H
H
H
L
OP Code
Mode Register Set
ILLEGAL
H
X
X
Auto or Self Refresh
ILLEGAL
L
X
X
Precharge
ILLEGAL
2
H
BA Row Address Bank Activate
ILLEGAL
2
L
BA
Column
Write
ILLEGAL
H
BA
Column
Read
ILLEGAL
L
X
X
Burst Termination
ILLEGAL
H
X
X
No Operation
Continue the Burst
L
OP Code
Mode Register Set
ILLEGAL
H
X
X
Auto or Self Refresh
ILLEGAL
L
X
X
Precharge
No Operation; Bank(s) idle after tRP
H
BA Row Address Bank Activate
ILLEGAL
2
L
BA
Column Write w/o Precharge
ILLEGAL
2
H
BA
Column Read w/o Precharge
ILLEGAL
20
L
X
X
Burst Termination No Operation; Bank(s) idle after tRP
H
X
X
No Operation
No Operation; Bank(s) idle after tRP
L
OP Code
Mode Register Set
ILLEGAL
H
X
X
Auto or Self Refresh
ILLEGAL
L
X
X
Precharge
ILLEGAL
2
H
BA Row Address Bank Activate
ILLEGAL
2
L
BA
Column
Write
ILLEGAL
2
H
BA
Column
Read
ILLEGAL
2
L
X
X
Burst Termination No Operation; Row active after tRCD
H
X
X
No Operation
No Operation; Row active after tRCD
L
OP Code
Mode Register Set
ILLEGAL
H
X
X
Auto orSelf Refresh
ILLEGAL
L
X
X
Precharge
ILLEGAL
2
H
BA Row Address Bank Activate
ILLEGAL
2
L
BA
Column
Write
Start Write; Determine if Auto Precharge 6
H
BA
Column
Read
Start Read; Determine if Auto Precharge 6
L
X
X
Burst Termination No Operation; Row active after tDPL
H
X
X
No Operation
No Operation; Row active after tDPL
L
OP Code
Mode Register Set
ILLEGAL
H
X
X
Auto orSelf Refresh
ILLEGAL
L
X
X
Precharge
ILLEGAL
2
H
BA Row Address Bank Activate
ILLEGAL
2
L
BA
Column
Write
ILLEGAL
2,6
H
BA
Column
Read
ILLEGAL
2,6
L
X
X
Burst Termination No Operation; Precharge after tDPL
H
X
X
No Operation
No Operation; Precharge after tDPL
July 2000 Rev. 0
9
White Electronic Designs Corporation • (508) 366-5151 • www.whiteedc.com
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