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IDT7025S15JB Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT7025S15JB Datasheet(HTML) 11 Page - Integrated Device Technology |
11 / 20 page IDT7025S/L HIGH-SPEED 8K x 16 DUAL-PORT STATIC RAM MILITARY AND COMMERCIAL TEMPERATURE RANGES 6.16 11 TIMING WAVEFORM OF SEMAPHORE READ AFTER WRITE TIMING, EITHER SIDE(1) 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. NOTES: 1. DOR = DOL = VIL, CER = CEL = VIH, or both UB & LB = VIH. 2. All timing is the same for left and right port. 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. TIMING WAVEFORM OF SEMAPHORE WRITE CONTENTION(1,3,4) SEM"A" 2683 drw 12 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” SEM 2683 drw 11 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) |
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