CY7C1166V18, CY7C1177V18
CY7C1168V18, CY7C1170V18
Document Number: 001-06620 Rev. *D Page 10 of 27
Write Cycle Descriptions
The write cycle descriptions of CY7C1166V18 and CY7C1168V18 follows. [2, 8]
BWS0/
NWS0
BWS1/
NWS1KKComments
L L L–H – During the Data portion of a write sequence:
CY7C1166V18 − both nibbles (D[7:0]) are written into the device.
CY7C1168V18 − both bytes (D[17:0]) are written into the device.
L L – L-H During the Data portion of a write sequence:
CY7C1166V18 − both nibbles (D[7:0]) are written into the device.
CY7C1168V18 − both bytes (D[17:0]) are written into the device.
L H L–H – During the Data portion of a write sequence:
CY7C1166V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4] remains unaltered.
CY7C1168V18 − only the lower byte (D[8:0]) is written into the device, D[17:9] remains unaltered.
L H – L–H During the Data portion of a write sequence:
CY7C1166V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4] remains unaltered.
CY7C1168V18 − only the lower byte (D[8:0]) is written into the device, D[17:9] remains unaltered.
H L L–H – During the Data portion of a write sequence:
CY7C1166V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0] remains unaltered.
CY7C1168V18 − only the upper byte (D[17:9]) is written into the device, D[8:0] remains unaltered.
H L – L–H During the Data portion of a write sequence:
CY7C1166V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0] remains unaltered.
CY7C1168V18 − only the upper byte (D[17:9]) is written into the device, D[8:0] remains unaltered.
H H L–H – No data is written into the devices during this portion of a write operation.
H H – L–H No data is written in to the devices during this portion of a write operation.
The write cycle descriptions of CY7C1177V18 follows. [2, 8]
BWS0K K Comments
L L-H – During the Data portion of a Write sequence, the single byte (D[8:0]) is written into the device.
L – L-H During the Data portion of a Write sequence, the single byte (D[8:0]) is written into the device.
H L-H – No data is written into the device during this portion of a Write operation.
H – L-H No data is written into the device during this portion of a Write operation.
Note
8. Is based on a write cycle was initiated in accordance with the Write Cycle Description Truth Table. Alter NWS0, NWS1, BWS0, BWS1, BWS2, and BWS3 on different
portions of a write cycle, as long as the setup and hold requirements are achieved.
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