Cypress CY7C1177V18, CY7C1168V18 manual Write Cycle Descriptions, Comments, Remains unaltered

CY7C1166V18, CY7C1177V18

CY7C1168V18, CY7C1170V18

Write Cycle Descriptions

The write cycle descriptions of CY7C1166V18 and CY7C1168V18 follows. [2, 8]

BWS0/	BWS1/		K			Comments
					K
NWS0		NWS1
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 into the devices during this portion of a write operation.

The write cycle descriptions of CY7C1177V18 follows. [2, 8]

BWS0	K	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.

Document Number: 001-06620 Rev. *D Page 10 of 27

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