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CY7C1338G Datasheet(PDF) 8 Page - Cypress Semiconductor

Part # CY7C1338G
Description  4-Mbit (128 K 횞 32) Flow-Through Sync SRAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1338G Datasheet(HTML) 8 Page - Cypress Semiconductor

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CY7C1338G
Document Number: 38-05521 Rev. *I
Page 8 of 21
Partial Truth Table for Read/Write
The partial truth table for Read/Write for CY7C1338G follows. [6, 7]
Function
GW
BWE
BWD
BWC
BWB
BWA
Read
H
H
X
X
X
X
Read
H
L
HH
HH
Write byte A
H
L
H
H
H
L
Write byte B
H
L
H
H
L
H
Write bytes B, A
H
L
H
H
L
L
Write byte C
H
L
H
L
H
H
Write bytes C, A
H
L
H
L
H
L
Write bytes C, B
H
L
H
L
L
H
Write bytes C, B, A
H
L
H
L
L
L
Write byte D
H
L
L
H
H
H
Write bytes D, A
H
L
L
H
H
L
Write bytes D, B
H
L
L
H
L
H
Write bytes D, B, A
H
L
L
H
L
L
Write bytes D, B
H
L
L
L
H
H
Write bytes D, B, A
H
L
L
L
H
L
Write bytes D, C, A
H
L
L
L
L
H
Write all bytes
H
LLL
LL
Write all bytes
L
X
X
X
X
X
Notes
6. X = “Don't Care.” H = Logic HIGH, L = Logic LOW.
7. Table only lists a partial listing of the byte write combinations. Any combination of BWX is valid. Appropriate write will be done based on which byte write is active.


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