IDT70V07S/L
HIGH-SPEED 3.3V 32K x 8 DUAL-PORT STATIC RAM
COMMERCIAL TEMPERATURE RANGE
TIMING WAVEFORM OF WRITE WITH PORT-TO-PORT READ AND BUSY (2,4,5)
ADDR"A"
W R/ "A"
DATAIN "A"
tAPS(1)
ADDR"B"
BUSY"B"
DATAOUT "B"
tWC
MATCH
tWP
tDW
tDH
VALID
MATCH
tBDA
tWDD
tDDD (3)
NOTES:
1. To ensure that the earlier of the two ports wins. tAPS is ignored for M/S = VIL (slave).
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".
tBDD
VALID
2943 drw 13
TIMING WAVEFORM OF WRITE WITH BUSY
WR/ "A"
BUSY"B"
tWP
tWB( 3 )
WR/ "B"
(2)
NOTES:
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.
tWH ( 1 )
2943 drw 14
6.37
11