CY7C1487V25 Просмотр технического описания (PDF) - Cypress Semiconductor
Номер в каталоге
Компоненты Описание
Список матч
CY7C1487V25 Datasheet PDF : 30 Pages
| |||
CY7C1481V25
CY7C1483V25
CY7C1487V25
Truth Table for Read/Write
The following is a Truth Table for Read/Write for the CY7C1481V25.[3, 8]
Function
GW
Read
H
Read
H
Write Byte A (DQA, DQPA)
H
Write Byte B(DQB, DQPB)
H
Write Bytes A, B (DQA, DQB, DQPA, DQPB)
H
Write Byte C (DQC, DQPC)
H
Write Bytes C, A (DQC, DQA, DQPC, DQPA)
H
Write Bytes C, B (DQC, DQB, DQPC, DQPB)
H
Write Bytes C, B, A (DQC, DQB, DQA, DQPC, DQPB, DQPA)
H
Write Byte D (DQD, DQPD)
H
Write Bytes D, A (DQD, DQA, DQPD, DQPA)
H
Write Bytes D, B (DQD, DQA, DQPD, DQPA)
H
Write Bytes D, B, A (DQD, DQB, DQA, DQPD, DQPB, DQPA)
H
Write Bytes D, B (DQD, DQB, DQPD, DQPB)
H
Write Bytes D, B, A (DQD, DQC, DQA, DQPD, DQPC, DQPA)
H
Write Bytes D, C, A (DQD, DQB, DQA, DQPD, DQPB, DQPA)
H
Write All Bytes
H
Write All Bytes
L
BWE
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
BWD
X
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
X
Truth Table for Read/Write
The following is a Truth Table for Read/Write for the CY7C1481V25.[3, 8]
Function (CY7C1483V25)
GW
Read
H
Read
H
Write Byte A - (DQA and DQPA)
H
Write Byte B - (DQB and DQPB)
H
Write All Bytes
H
Write All Bytes
L
Truth Table for Read/Write
The following is a Truth Table for Read/Write for the CY7C1481V25. [3, 8]
Function (CY7C1487V25)
GW
Read
H
Read
H
Write Byte x – (DQx and DQPx)
H
Write All Bytes
H
Write All Bytes
L
BWE
H
L
L
L
L
X
BWE
H
L
L
L
X
BWC
X
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
X
BWB
X
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
X
BWA
X
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
X
BWB
X
H
H
L
L
X
BWA
X
H
L
H
L
X
BWx[9]
X
All BW = H
L
All BW = L
X
Notes
8. Table only includes a partial listing of the byte write combinations. Any combination of BWX is valid. Appropriate write is done based on which byte write is active.
9. BWx represents any byte write signal BWX. 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 any given write.
Document #: 38-05281 Rev. *H
Page 11 of 30
[+] Feedback
Share Link: 