CY7C43643 CYPRESS [Cypress Semiconductor], CY7C43643 Datasheet - Page 22

• 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:
33. If Port B size is word or byte, t
34. t
CLKB
CSB
W/RB
MBB
ENB
B
CLKA
FF/IR
CSA
W/RA
MBA
ENA
A
EF/OR
IR Flag Timing and First Available Write when FIFO is Full (FWFT Mode)
0–35
0–35
CLKB edge and rising CLKA edge is less than t
SKEW1
is the minimum time between a rising CLKB edge and a rising CLKA edge for IR to transition HIGH in the next CLKA cycle. If the time between the rising
LOW
Previous Word in FIFO
Output Register
HIGH
HIGH
HIGH
LOW
FIFO Full
t
CLKH
t
CLK
t
CLKL
SKEW1
t
ENS
(continued)
t
ENH
is referenced to the rising CLKB edge that reads the last word or byte write of the long word, respectively.
t
SKEW1
t
A
[34]
SKEW1
Next Word From FIFO
t
CLKH
, then IR may transition HIGH one CLKA cycle later than shown.
t
CLK
t
CLKL
t
WFF
t
t
t
ENS
ENS
DS
To FIFO
t
t
t
ENH
ENH
DH
t
WFF
[33]
CY7C43643
CY7C43663
CY7C43683
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