CY7C43643 CYPRESS [Cypress Semiconductor], CY7C43643 Datasheet - Page 21

• Manufacturer Part Number: CY7C43643
• Description: 1K/4K/16K x36 Unidirectional Synchronous FIFO with Bus Matching
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-06021 Rev. *B
Switching Waveforms
Notes:
32. t
EF Flag Timing and First Data Read Fall Through when FIFO is Empty (CY Standard Mode)
CLKA
CSA
W/RA
MBA
ENA
FF/IR
A
CLKB
EF/OR
CSB
W/RB
MBB
ENB
B
CLKA edge and rising CLKB edge is less than t
SKEW1
0–35
0–35
is the minimum time between a rising CLKA edge and a rising CLKB edge for EF to transition HIGH in the next CLKB cycle. If the time between the rising
LOW
HIGH
HIGH
HIGH
LOW
LOW
FIFO Empty
(continued)
t
t
t
ENS
ENS
DS
W1
t
t
ENH
ENH
t
DH
t
SKEW
SKEW1
[32]
, then the transition of EF HIGH may occur one CLKB cycle later than shown.
t
CLKH
t
CLK
t
CLKL
t
REF
t
CLKH
t
CLK
t
ENS
t
CLKL
t
ENH
t
t
REF
A
[30]
W1
CY7C43643
CY7C43663
CY7C43683
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