IDT7015S/L
High-Speed 8K x 9 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Timing Waveform of Read with BUSY(2,4,5) (M/S = VIH)
tWC
ADDR"A"
MATCH
tWP
R/W"A"
DATAIN "A"
ADDR"B"
tAPS(1)
BUSY"B"
tDW
VALID
MATCH
tDH
tBDA
tBDD
tWDD
DATAOUT "B"
tDDD (3)
NOTES:
1. To ensure that the earlier of the two ports wins. tAPS is ignored for M/S=VIL
2. CEL = CER = VIL
3. OE = VIL for the reading port.
4. If M/S=VIL (SLAVE), BUSY is an input. Then for this example, BUSY“A”=VIH and BUSY“B” input is shown above.
5. All timing is the same for left and right ports. Port "A" may be either the left or right port. Port "B" is the port opposite from Port "A".
VALID
2954 drw 13
Timing Waveform of Write with BUSY(3)
tWP
R/W"A"
tWB
BUSY"B"
tWH (1)
R/W"B"
(2)
NOTES:
2954 drw 14
1. tWH must be met for both BUSY input (SLAVE) and output (MASTER).
2. BUSY is asserted on port "B" blocking R/W"B", until BUSY"B" goes HIGH.
3. All timing is the same for left and right ports. Port "A" may be either the left or right port. Port "B" is the port opposite from Port "A".
61.432
APRIL 04, 2006