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參數(shù)資料
| 型號(hào)： | IDT7130LA20FB |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | HIGH-SPEED 1K x 8 DUAL-PORT STATIC RAM |
| 中文描述： | 高速每1000 × 8雙端口靜態(tài)RAM |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 218K |
| 代理商： | IDT7130LA20FB |
IDT7130SA/LA AND IDT7140SA/LA
HIGH-SPEED 1K x 8 DUAL-PORT STATIC RAM WITH INTERRUPTS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.01
12
TRUTH TABLES
TABLE I — NON-CONTENTION
READ/WRITE CONTROL
(4)
Left or Right Port
(1)
R/
W
CE
OE
D
0–7
X
H
X
Function
Z
Port Disabled and in Power-
Down Mode, I
SB2
or I
SB4
CE
R
=
CE
L
=
V
IH
, Power-Down
Mode, I
SB1
or I
SB3
Data on Port Written Into Memory
(2)
DATA
OUT
Data in Memory Output on Port
(3)
Z
High Impedance Outputs
X
H
X
Z
L
H
H
L
L
L
X
L
H
DATA
IN
NOTES:
1. A
0L
– A
10L
≠
A
0R
– A
10R
.
2. If
BUSY
= L, data is not written.
3. If
BUSY
= L, data may not be valid, see t
WDD
and t
DDD
timing.
4. 'H' = V
IH
, 'L' = V
IL
, 'X' = DON’T CARE, 'Z' = HIGH IMPEDANCE
2689 tbl 13
TABLE III — ADDRESS BUSY ARBITRATION
Inputs
A
0L
-A
9L
CE
L
CE
R
A
0R
-A
9R
BUSY
L(1)
X
X
NO MATCH
H
X
MATCH
X
H
MATCH
L
L
MATCH
(2)
Outputs
BUSY
R(1)
H
H
H
(2)
Function
Normal
Normal
Normal
Write Inhibit
(3)
H
H
H
NOTES:
1. Pins
BUSY
L
and
BUSY
R
are both outputs for IDT7130 (master). Both are
inputs for IDT7140 (slave).
BUSY
X
outputs on the IDT7130 are open drain,
not push-pull outputs. On slaves the
BUSY
X
input internally inhibits writes.
2. 'L' if the inputs to the opposite port were stable prior to the address and
enable inputs of this port. 'H' if the inputs to the opposite port became
stable after the address and enable inputs of this port. If tAPS is not met,
either
BUSY
L
or
BUSY
R
= Low will result.
BUSY
L
and
BUSY
R
outputs can
not be low simultaneously.
3. Writes to the left port are internally ignored when
BUSY
L
outputs are
driving Low regardless of actual logic level on the pin. Writes to the right
port are internally ignored when
BUSY
R
outputs are driving Low regard-
less of actual logic level on the pin.
2689 tbl 15
TABLE II — INTERRUPT FLAG
(1,4)
Left Port
OE
L
Right Port
R
X
L
L
X
R/
W
L
L
X
X
X
CE
L
L
X
X
L
A
9L
– A
0L
3FF
X
X
3FE
INT
L
X
X
L
(3)
H
(2)
R/
W
R
X
X
L
X
CE
OE
R
X
L
X
X
A
9L
– A
0R
X
3FF
3FE
X
INT
R
L
(2)
H
(3)
X
X
Function
X
X
X
L
Set Right
INT
R
Flag
Reset Right
INT
R
Flag
Set Left
INT
L
Flag
Reset Left
INT
L
Flag
NOTES
:
1. Assumes
BUSY
L
=
BUSY
R
= V
IH
2. If
BUSY
L
= V
IL
, then No Change.
3. If
BUSY
R
= V
IL
, then No Change.
4. 'H' = HIGH,' L' = LOW,' X' = DON’T CARE
2689 tbl 14
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