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CY7C1482BV25-200BZXC Datasheet(PDF) 11 Page - Cypress Semiconductor

Part # CY7C1482BV25-200BZXC
Description  72-Mbit (2M x 36/4M x 18/1M x 72) Pipelined Sync SRAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1482BV25-200BZXC Datasheet(HTML) 11 Page - Cypress Semiconductor

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CY7C1480BV25
CY7C1482BV25, CY7C1486BV25
Document #: 001-15143 Rev. *D
Page 11 of 31
Table 5. Truth Table for Read/Write
The read-write truth table for the CY7C1480BV25 follows.[5]
Function (CY7C1480BV25)
GW
BWE
BWD
BWC
BWB
BWA
Read
H
H
XX
XX
Read
H
L
HH
HH
Write Byte A – (DQA and DQPA)H
L
H
H
H
L
Write Byte B – (DQB and DQPB)H
L
H
H
L
H
Write Bytes B, A
H
L
H
H
L
L
Write Byte C – (DQC and DQPC)
H
LHLH
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 – (DQD and DQPD)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, C
H
L
L
L
H
H
Write Bytes D, C, A
H
L
L
L
H
L
Write Bytes D, C, B
H
L
L
L
L
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
XXX
XX
Table 6. Truth Table for Read/Write
The read-write truth table for the CY7C1482BV25 follows.[5]
Function (CY7C1482BV25)
GW
BWE
BWB
BWA
Read
H
H
X
X
Read
H
L
H
H
Write Byte A – (DQA and DQPA)H
L
H
L
Write Byte B – (DQB and DQPB)H
L
L
H
Write Bytes B, A
H
L
L
L
Write All Bytes
H
L
L
L
Write All Bytes
L
X
X
X
Table 7. Truth Table for Read/Write
The read-write truth table for the CY7C1486BV25 follows.[8]
Function (CY7C1486BV25)
GW
BWE
BWX
Read
HH
X
Read
H
L
All BW = H
Write Byte x – (DQx and DQPx)H
L
L
Write All Bytes
H
L
All BW = L
Write All Bytes
L
X
X
Note
8. BWx represents any byte write signal BW[0..7]. To enable any byte write BWx, a Logic LOW signal must be applied at clock rise. Any number of byte writes can be
enabled at the same time for a supplied write.
[+] Feedback


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