參數(shù)資料
型號: 70V659S15DR
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: SRAM
英文描述: 128K X 36 DUAL-PORT SRAM, 15 ns, PQFP208
封裝: 28 X 28 MM, 3.50 MM HEIGHT, PLASTIC, QFP-208
文件頁數(shù): 6/24頁
文件大?。?/td> 316K
代理商: 70V659S15DR
IDT70V659/58/57S
High-Speed 3.3V 128/64/32K x 36 Asynchronous Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
14
Timing Waveform of Semaphore Read after Write Timing, Either Side(1)
NOTES:
1. DOR = DOL = VIL, CEL = CER = VIH. 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 tSPS 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 = VIH for the duration of the above timing (both write and read cycle) (Refer to Chip Enable Truth Table). Refer also to Truth Table II for appropriate BE controls.
2. "DATAOUT VALID" represents all I/O's (I/O0 - I/O35) equal to the semaphore value.
SEM/BEn(1)
4869 drw 10
tAW
tEW
I/O
VALID ADDRESS
tSAA
R/
W
tWR
tOH
tACE
VALID ADDRESS
DATA
VALID
IN
DATAOUT
tDW
tWP
tDH
tAS
tSWRD
tAOE
Read Cycle
Write Cycle
A0-A2
OE
VALID(2)
tSOP
SEM"A"
4869 drw 11
tSPS
MATCH
R/
W"A"
MATCH
A0"A"-A2"A"
SIDE
"A"
(2)
SEM"B"
R/
W"B"
A0"B"-A2"B"
SIDE
"B"
(2)
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