CY7C09079V/89V/99V
CY7C09179V/89V/99V
Document #: 38-06043 Rev. *C Page 10 of 21
Figure 9. Left Port Write to Flow-Through Right Port Read[22, 23, 24, 25]
Notes
20.In this depth expansion example, B1 represents Bank #1 and B2 is Bank #2; Each Bank consists of one Cypress dual-port device from this datasheet. ADDRESS(B1)
= ADDRESS(B2).
21.OE and ADS = VIL; CE1(B1), CE1(B2), R/W, CNTEN, and CNTRST = VIH.
22.The same waveforms apply for a right port write to flow-through left port read.
23.CE0 and ADS = VIL; CE1, CNTEN, and CNTRST = VIH.
24.OE = VIL for the right port, which is being read from. OE = VIH for the left port, which is being written to.
25.It tCCS maximum specified, then data from right port READ is not valid until the maximum specified for tCWDD. If tCCS>maximum specified, then data is not valid
until tCCS + tCD1. tCWDD does not apply in this case.
Switching Waveforms (continued)
tSA tHA
tSW tHW
tSD tHD
MATCH
VALID
tCCS
tSW tHW
tDC
tCWDD
tCD1
MATCH
tSA tHA
MATCH
NO
MATCH
NO
VALID VALID
tDC
tCD1
CLKL
R/WL
ADDRESSL
DATAINL
ADDRESSR
DATAOUTR
CLKR
R/WR
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