CY7C43643 CYPRESS [Cypress Semiconductor], CY7C43643 Datasheet - Page 18

• 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:
26. Read from FIFO.
27. If W/RB switches from read to write before the assertion of CSB, t
28. Unused word B
OR
OR
CLKB
W/RB
(Standard Mode)
B
(Standard Mode)
B
(FWFT Mode)
Port B Long-Word Read Cycle Timing for FIFO (CY Standard and FWFT Modes)
EF/OR
CSB
MBB
ENB
B
B
(FWFT Mode)
Port B Word Read Cycle Timing for FIFO (CY Standard and FWFT Modes)
CLKB
EF/OR
W/RB
MBB
CSB
ENB
0–35
0–35
0–17
0–17
[27]
[27]
18–35
contains all zeroes for word-size reads.
t
CLKH
(continued)
t
t
t
t
EN
EN
EN
EN
t
CLK
t
t
MDV
MDV
t
t
MDV
MDV
t
CLKL
t
ENS
t
ENS
Previous Data
t
ENH
Previous
W1
t
ENH
Read 1
[26]
t
ENS
t
t
A
t
A
A
A
= t
DIS
+t
ENS
.
W1
W2
Read 2
Read 1
[26]
[26]
t
ENS
t
ENH
[1, 28]
t
t
t
t
A
A
A
A
[1]
No Operation
No Operation
t
W3
W2
Read 2
Read 3
ENS
[26]
[26]
CY7C43643
CY7C43663
CY7C43683
t
EN
Page 18 of 29
t
t
DIS
DIS
t
t
DIS
DIS