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70261L55PFG8 Datasheet(PDF) 10 Page - Integrated Device Technology |
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70261L55PFG8 Datasheet(HTML) 10 Page - Integrated Device Technology |
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10 / 20 page  6.42 IDT70261S/L High-Speed 16K x 16 Dual-Port Static RAM with Interrupt Industrial and Commercial Temperature Ranges 10 Timing Waveform of Semaphore Read after Write Timing, Either Side(1) Timing Waveform of Semaphore Write Contention(1,3,4) 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, there is no guarantee which side will be granted the semaphore flag. NOTES: 1. CE = VIH or UB and 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 3039 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) SEM"A" 3039 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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