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CY7C1248V18-375BZXI Datasheet(PDF) 11 Page - Cypress Semiconductor

Part # CY7C1248V18-375BZXI
Description  36-Mbit DDR-II SRAM 2-Word Burst Architecture (2.0 Cycle Read Latency)
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1248V18-375BZXI Datasheet(HTML) 11 Page - Cypress Semiconductor

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CY7C1246V18
CY7C1257V18
CY7C1248V18
CY7C1250V18
Document Number: 001-06348 Rev. *C
Page 11 of 27
Write Cycle Descriptions
The write cycle descriptions table for CY7C1250V18 follows.[2, 8]
BWS0 BWS1 BWS2 BWS3
KK
Comments
LLLL
L-H
During the data portion of a write sequence, all four bytes (D[35:0]) are written
into the device.
LLLL
L-H During the data portion of a write sequence, all four bytes (D[35:0]) are written
into the device.
L
H
H
H
L-H
During the data portion of a write sequence, only the lower byte (D[8:0]) is
written into the device. D[35:9] remains unaltered.
L
H
H
H
L-H During the data portion of a write sequence, only the lower byte (D[8:0]) is
written into the device. D[35:9] remains unaltered.
H
L
H
H
L-H
During the data portion of a write sequence, only the byte (D[17:9]) is written
into the device. D[8:0] and D[35:18] remain unaltered.
H
L
H
H
L-H During the data portion of a write sequence, only the byte (D[17:9]) is written
into the device. D[8:0] and D[35:18] remain unaltered.
H
H
L
H
L-H
During the data portion of a write sequence, only the byte (D[26:18]) is written
into the device. D[17:0] and D[35:27] remain unaltered.
H
H
L
H
L-H During the data portion of a write sequence, only the byte (D[26:18]) is written
into the device. D[17:0] and D[35:27] remain unaltered.
H
H
H
L
L-H
During the data portion of a write sequence, only the byte (D[35:27]) is written
into the device. D[26:0] remains unaltered.
H
H
H
L
L-H During the data portion of a write sequence, only the byte (D[35:27]) is written
into the device. D[26:0] remains unaltered.
HHHH
L-H
No data is written into the device during this portion of a write operation.
HHHH
L-H No data is written into the device during this portion of a write operation.
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