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Número de pieza
componentes Descripción
CY7C421-20JXI Ver la hoja de datos (PDF) - Cypress Semiconductor
Número de pieza
componentes Descripción
Fabricante
CY7C421-20JXI
512 × 9 Asynchronous FIFO
Cypress Semiconductor
CY7C421-20JXI Datasheet PDF : 21 Pages
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CY7C421
Switching Waveforms
R
Figure 5. Asynchronous Read and Write
t
RC
t
A
t
RR
t
PR
t
A
Q
0
–Q
8
W
t
LZR
t
PW
t
DVR
DATA VALID
t
WC
t
WR
t
HZR
DATA VALID
D
0
–D
8
MR
R, W
[9]
EF
HF
FF
t
SD
t
HD
DATA VALID
Figure 6. Master Reset
t
MRSC
[10]
t
PMR
DATA VALID
t
EFL
t
HFH
t
FFH
t
RPW
t
WPW
t
RMR
Figure 7. Half-full Flag
HALF FULL
W
R
HF
t
WHF
HALF FULL+1
HALF FULL
t
RHF
Notes
9. W and R

V
IH
around the rising edge of MR.
10. t
MRSC
= t
PMR
+ t
RMR
.
Document Number: 38-06001 Rev. *H
Page 9 of 21
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