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IDT7005S25PFB Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT7005S25PFB Datasheet(HTML) 11 Page - Integrated Device Technology |
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11 / 20 page  IDT7005S/L HIGH-SPEED 8K x 8 DUAL-PORT STATIC RAM MILITARY AND COMMERCIAL TEMPERATURE RANGES 6.06 11 TIMING WAVEFORM OF SEMAPHORE READ AFTER WRITE TIMING, EITHER SIDE(1) 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/O7) equal to the semaphore value. SEM"A" 2738 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 “B” (2) NOTES: 1. DOR = DOL = VIL, CER = CEL = VIH. Semaphore flag is released from both sides (reads as ones from both sides) at cycle start. 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. SEM 2738 drw 11 tAW tEW tSOP I/O 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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