gs8662dt10bgd-450i GSI Technology, gs8662dt10bgd-450i Datasheet - Page 9

• Manufacturer Part Number: gs8662dt10bgd-450i
• Description: 72mb Sigmaquad-ii+tm Burst Of 4 Sram
• Manufacturer: GSI Technology

Separate I/O SigmaQuad II+ B4 SRAM Truth Table
x36 Byte Write Enable (BWn) Truth Table
Rev: 1.00 5/2011
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Notes:
1.
2.
3.
4.
5.
BW0
Operation
Previous
Deselect
Deselect
Deselect
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Write
Read
Read
Write
(t
“1” = input “high”; “0” = input “low”; “V” = input “valid”; “X” = input “don’t care”
“—” indicates that the input requirement or output state is determined by the next operation.
Q0, Q1, Q2, and Q3 indicate the first, second, third, and fourth pieces of output data transferred during Read operations.
D0, D1, D2, and D3 indicate the first, second, third, and fourth pieces of input data transferred during Write operations.
Users should not clock in metastable addresses.
K ↑
n-1
)
BW1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
K ↑
(t
A
X
X
X
V
V
V
V
n
)
BW2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
K ↑
(t
R
X
X
1
1
1
0
0
n
)
K ↑
(t
BW3
W
X
X
X
1
1
0
0
n
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
)
Operation
Current
Deselect
Deselect
Deselect
Read
Read
Write
Write
K ↑
(t
n
)
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
D0–D8
Data In
Data In
Data In
Data In
Data In
Data In
Data In
Data In
(t
9/29
K ↑
D2
D0
D0
D2
n+1
D
X
X
X
)
(t
K ↑
n+1½
D3
D1
D1
D3
D
X
X
X
GS8662DT07/10/19/37BD-450/400/350/333/300
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
)
D9–D17
Data In
Data In
Data In
Data In
Data In
Data In
Data In
Data In
(t
K ↑
D2
D2
n+2
—
—
—
—
—
D
)
(t
K ↑
n+2½
D3
D3
—
—
—
—
—
D
)
D18–D26
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Data In
Data In
Data In
Data In
Data In
Data In
Data In
Data In
(t
Hi-Z
Hi-Z
Hi-Z
K ↑
Q0
Q2
Q0
Q2
Q
n+2)
(t
Hi-Z
Hi-Z
Hi-Z
K ↑
n+2½
Q3
Q1
Q3
Q1
Q
© 2011, GSI Technology
)
(t
K ↑
Q2
Q2
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
D27–D35
n+3
—
—
—
—
—
Q
Data In
Data In
Data In
Data In
Data In
Data In
Data In
Data In
)
(t
K ↑
n+3½
Q3
Q3
—
—
—
—
—
Q
)