OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

CY7C421-15AXCT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
CY7C421
Document Number: 38-06001 Rev. *K Page 10 of 22
Figure 8. Last Write to First Read Full Flag
Figure 9. Last Read to First Write Empty Flag
Figure 10. Retransmit
[11]
Switching Waveforms (continued)
LAST WRITE FIRST READ
ADDITIONAL
READS FIRST WRITE
t
WFF
t
RFF
R
W
FF
VALID
LAST READ FIRST WRITE
ADDITIONAL
WRITES
FIRST READ
VALID
t
REF
t
WEF
t
A
W
R
EF
Q0–Q8
t
RTC
t
PRT
t
RTR
FL/RT
R,W
[12]
Notes
11. EF
, HF and FF may change state during retransmit as a result of the offset of the read and write pointers, but flags are valid at t
RTC
.
12. t
RTC
= t
PRT
+ t
RTR
.
CY7C421
Document Number: 38-06001 Rev. *K Page 11 of 22
Figure 11. Empty Flag and Read Data Flow-through Mode
Figure 12. Full Flag and Write Data Flow-through Mode
Switching Waveforms (continued)
W
R
EF
D0–D8
Q0–Q8
DATA VALID
t
RAE
t
REF
t
WEF
t
HWZ
t
A
t
RPE
R
W
FF
D0–D8
Q0–Q8
DATA VALID
DATA VALID
t
WAF
t
WPF
t
WFF
t
RFF
t
SD
t
HD
t
A
CY7C421
Document Number: 38-06001 Rev. *K Page 12 of 22
Figure 13. Expansion Timing Diagrams
Switching Waveforms (continued)
R
W
XO
1
(XI
2
)
D
0
–D
8
DATA VALID
DATA DATA
VALID
VALID
t
XOL
t
XOH
t
HD
t
SD
t
SD
t
HD
t
XOL
t
LZR
t
A
t
DVR
t
XOH
t
A
t
DVR
t
HZR
XO
1
(XI
2
)
Q
0
–Q
8
WRITE TO LAST PHYSICAL
LOCATION OF DEVICE 1
WRITE TO FIRST PHYSICAL
LOCATION OF DEVICE 2
READ FROM LAST PHYSICAL
LOCATION OF DEVICE 1
READ FROM FIRST PHYSICAL
LOCATION OF DEVICE 2
t
WR
t
RR
DATA VALID
[13]
[13]
Note
13. Expansion Out of device 1 (XO
1
) is connected to Expansion In of device 2 (XI
2
).
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

CY7C421-15AXCT

Mfr. #:
Buy CY7C421-15AXCT
Manufacturer:
Cypress Semiconductor
Description:
FIFO 512x9 .300" PARALLEL CASCADEABLE FIFO COM
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet