參數(shù)資料
型號(hào): IDT7027L55PF
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: HIGH-SPEED 32K x 16 DUAL-PORT STATIC RAM
中文描述: 32K X 16 DUAL-PORT SRAM, 55 ns, PQFP100
封裝: TQFP-100
文件頁數(shù): 4/19頁
文件大?。?/td> 160K
代理商: IDT7027L55PF
6.42
IDT7027S/L
High-Speed 32K x 16 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
NOTES:
1. Chip Enable references are shown above with the actual
CE
0
and CE
1
levels,
CE
is a reference only.
2. Port "A" and "B" references are located where
CE
is used.
3. "H" = V
IH
and "L" = V
IL
.
$%$&'(%)&
$%$&''(#*+,-.
NOTES:
1. A
0L
A
14L
A
0R
A
14R.
2. Refer to Chip Enable Truth Table.
$%$&'''(/%+,-.
NOTES:
1. There are eight semaphore flags written to via I/O
0
and read fromall the I/Os (I/O
0
__
I/O
15
). These eight semaphore flags are addressed by A
0
-A
2
.
2. Refer to Chip Enable Truth Table.
CE
CE
0
CE
1
Mode
L
V
IL
V
IH
Port Selected (TTL Active)
< 0.2V
>V
CC
-0.2V
Port Selected (CMOS Active)
H
V
IH
X
Port Deselected (TTL Inactive)
X
V
IL
Port Deselected (TTL Inactive)
>V
CC
-0.2V
X
Port Deselected (CMOS Inactive)
X
<0.2V
Port Deselected (CMOS Inactive)
3199 tbl 02
Inputs
(1)
Outputs
Mode
CE
(2)
R/
W
OE
UB
LB
SEM
I/O
8-15
I/O
0-7
H
X
X
X
X
H
High-Z
High-Z
Deselected: Power-Down
X
X
X
H
H
H
High-Z
High-Z
Both Bytes Deselected
L
L
X
L
H
H
DATA
IN
High-Z
Write to Upper Byte Only
L
L
X
H
L
H
High-Z
DATA
IN
Write to Lower Byte Only
L
L
X
L
L
H
DATA
IN
DATA
IN
Write to Both Bytes
L
H
L
L
H
H
DATA
OUT
High-Z
Read Upper Byte Only
L
H
L
H
L
H
High-Z
DATA
OUT
Read Lower Byte Only
L
H
L
L
L
H
DATA
OUT
DATA
OUT
Read Both Bytes
X
X
H
X
X
X
High-Z
High-Z
Outputs Disabled
3199 tbl 03
Inputs
(1)
Outputs
Mode
CE
(2)
R/
W
OE
UB
LB
SEM
I/O
8-15
I/O
0-7
H
H
L
X
X
L
DATA
OUT
DATA
OUT
Read Data in Semaphore Flag
X
H
L
H
H
L
DATA
OUT
DATA
OUT
Read Data in Semaphore Flag
H
X
X
X
L
DATA
IN
DATA
IN
Write I/O
0
into Semaphore Flag
X
X
H
H
L
DATA
IN
DATA
IN
Write I/O
0
into Semaphore Flag
L
X
X
L
X
L
______
______
Not Allowed
L
X
X
X
L
L
______
______
Not Allowed
3199 tbl 04
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