CY7C43643 CYPRESS [Cypress Semiconductor], CY7C43643 Datasheet - Page 23

• 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
Note:
35. t
CSB
ENB
CLKA
W/RA
A
FF Flag Timing and First Available Write when FIFO is Full (CY Standard Mode)
CLKB
W/RB
MBB
EF/OR
B
FF/IR
CSA
MBA
ENA
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 FF 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
LOW
FIFO Full
t
CLKH
t
CLK
t
CLKL
t
ENS
(continued)
t
ENH
t
SKEW1
t
A
[35]
SKEW1
Next Word From FIFO
t
CLKH
, then the transition of FF HIGH may occur one CLKA cycle later than shown.
t
CLK
t
CLKL
t
WFF
t
t
ENS
ENS
t
DS
t
t
ENH
t
ENH
DH
t
WFF
[33]
CY7C43643
CY7C43663
CY7C43683
Page 23 of 29