Cypress CY7C1156V18, CY7C1145V18 manual Write Cycle Descriptions, Comments, Remains unaltered

CY7C1141V18, CY7C1156V18

CY7C1143V18, CY7C1145V18

Write Cycle Descriptions

The write cycle descriptions of CY7C1141V18 and CY7C1143V18 follows. [2, 10]

	BWS0/		BWS1/		K				Comments
								K
	NWS0			NWS1
	L			L	L–H			–	During the data portion of a write sequence:
									CY7C1141V18 − both nibbles (D[7:0]) are written into the device.
									CY7C1143V18 − both bytes (D[17:0]) are written into the device.
	L			L	–		L-H		During the data portion of a write sequence:
									CY7C1141V18 − both nibbles (D[7:0]) are written into the device.
									CY7C1143V18 − both bytes (D[17:0]) are written into the device.
	L			H	L–H			–	During the data portion of a write sequence:
									CY7C1141V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4]		remains unaltered.
									CY7C1143V18 − 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:
									CY7C1141V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4]		remains unaltered.
									CY7C1143V18 − 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:
									CY7C1141V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0] remains unaltered.
									CY7C1143V18 − 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:
									CY7C1141V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0] remains unaltered.
									CY7C1143V18 − 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 CY7C1156V18 follows.[2, 10]
	BWS	0		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

10.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: 001-06583 Rev. *D Page 11 of 28

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