參數(shù)資料
型號(hào): IDT70T653MS12BC
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi): DRAM
英文描述: HIGH-SPEED 2.5V 512K x 36 ASYNCHRONOUS DUAL-PORT STATIC RAM WITH 3.3V 0R 2.5V INTERFACE
中文描述: 512K X 36 DUAL-PORT SRAM, 12 ns, PBGA256
封裝: BGA-256
文件頁(yè)數(shù): 14/24頁(yè)
文件大?。?/td> 309K
代理商: IDT70T653MS12BC
IDT70T653M Preliminary
High-Speed 2.5V 512K x 36 Asynchronous Dual-Port Static RAM Industrial and Commercial Temperature Ranges
Timing Waveform of Semaphore Read after Write Timing, Either Side
(1)
14
NOTES:
1. D
OR
= D
OL
= V
IL
,
CE
L
=
CE
R
= V
IH
. Refer to Truth Table II for appropriate
BE
controls.
2. All timing is the same for left and right ports. Port "A" may be either left or right port. "B" is the opposite from port "A".
3. This parameter is measured from R/
W
"A"
or
SEM
"A"
going HIGH to R/
W
"B"
or
SEM
"B"
going HIGH.
4. If t
SPS
is not satisfied,the semaphore will fall positively to one side or the other, but there is no guarantee which side will be granted the semaphore flag.
Timing Waveform of Semaphore Write Contention
(1,3,4)
NOTES:
1.
CE
0
= V
IH
and CE
1
= V
IL
are required for the duration of both the write cycle and the read cycle waveforms shown above. Refer to Truth Table II for details and for
appropriate
BE
n controls.
2. "DATA
OUT
VALID" represents all I/O's (I/O
0
- I/O
8
and
I/O
18
- I/O
26
) equal to the semaphore value.
SEM
(1)
5679 drw 12
t
AW
t
EW
I/O
VALID ADDRESS
t
SAA
R/
W
t
WR
t
OH
t
ACE
VALID ADDRESS
DATA
VALID
IN
DATA
OUT
VALID
(2)
t
DW
t
WP
t
DH
t
AS
t
SWRD
t
SOE
Read Cycle
Write Cycle
A
0
-A
2
OE
t
SOP
t
SOP
.
SEM
"A"
5679 drw 13
t
SPS
MATCH
R/
W
"A"
MATCH
A
0"A"
-A
2"A"
SIDE
"A"
(2)
SEM
"B"
R/
W
"B"
A
0"B"
-A
2"B"
SIDE
"B"
(2)
.
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