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7015S15JGI8 Datasheet(PDF) 11 Page - Integrated Device Technology |
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7015S15JGI8 Datasheet(HTML) 11 Page - Integrated Device Technology |
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11 / 21 page  6.42 IDT7015S/L High-Speed 8K x 9 Dual-Port Static RAM Industrial and Commercial Temperature Ranges 11 Timing Waveform of Semaphore Read after Write Timing, Either Side(1) NOTES: 1. DOR = DOL =VIH, CER = CEL =VIH. 2. All timing is the same for left and right ports. Port“A” may be either left or right port. “B” is the opposite port from “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 obtain 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). 2. “DATAOUT VALID” represents all I/O's (I/O0-I/O8) equal to the semaphore value. SEM 2954 drw 11 tAW tEW tSOP I/O VALID ADDRESS tSAA R/ W tWR tOH tACE VALID ADDRESS DATAIN VALID DATAOUT tDW tWP tDH tAS tAOE Read Cycle Write Cycle A0-A2 OE VALID(2) tSWRD SEM"A" 2954 drw 12 tSPS MATCH R/ W"A" MATCH A0"A"-A2"A" SIDE "A" (2) SEM"B" R/ W"B" SIDE "B" (2) A0"B"-A2"B" |
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