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70V261S35PFG Datasheet(PDF) 9 Page - Integrated Device Technology |
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70V261S35PFG Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 17 page 6.42 IDT70V261S/L High-Speed 16K x 16 Dual-Port Static RAM with Interrupt Industrial and Commercial Temperature Ranges 9 SEM 3040 drw 09 tAW tEW tSOP I/O0 VALID ADDRESS tSAA R/ W tWR tOH tACE VALID ADDRESS DATAIN VALID DATAOUT tDW tWP tDH tAS tSWRD tAOE Read Cycle Write Cycle A0-A2 OE VALID(2) Timing Waveform of Semaphore Read after Write Timing, Either Side(1) NOTES: 1. DOR = DOL = VIL, CER = CEL = VIH, or both UB & LB = VIH. 2. All timing is the same for left and right ports. Port “A” may be either left or right port. 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 obtain the flag. Timing Waveform of Semaphore Write Contention(1,3,4) NOTES: 1. CE = VIH or UB & LB = VIH for the duration of the above timing (both write and read cycle). 2. “DATAOUT VALID” represents all I/O's (I/O0-I/O15) equal to the semaphore value. SEM"A" 3040 drw 10 tSPS MATCH R/ W"A" MATCH A0"A"-A2"A" SIDE "A" (2) SEM"B" R/ W"B" A0"B"-A2"B" SIDE (2) "B" |
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