Cypress CY7C1515V18, CY7C1513V18, CY7C1511V18 manual Write Cycle Descriptions, Comments, NWS1, BWS0

									CY7C1511V18, CY7C1526V18
									CY7C1513V18, CY7C1515V18
Write Cycle Descriptions
The write cycle description table for CY7C1511V18 and CY7C1513V18 follows. [2, 10]
	BWS	0/	BWS	1/	K				Comments
							K
	NWS0		NWS1
	L		L		L–H		–	During the data portion of a write sequence:
								CY7C1511V18 − both nibbles (D[7:0]) are written into the device.
								CY7C1513V18 − both bytes (D[17:0]) are written into the device.
	L		L		–	L-H		During the data portion of a write sequence :
								CY7C1511V18 − both nibbles (D[7:0]) are written into the device.
								CY7C1513V18 − both bytes (D[17:0]) are written into the device.
	L		H		L–H		–	During the data portion of a write sequence :
								CY7C1511V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4]			remains unaltered.
								CY7C1513V18 − 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 :
								CY7C1511V18 − only the lower nibble (D[3:0]) is written into the device, D[7:4]			remains unaltered.
								CY7C1513V18 − 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 :
								CY7C1511V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0]			remains unaltered.
								CY7C1513V18 − 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 :
								CY7C1511V18 − only the upper nibble (D[7:4]) is written into the device, D[3:0]			remains unaltered.
								CY7C1513V18 − 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.

Write Cycle Descriptions

The write cycle description table for CY7C1526V18 follows. [2, 10]

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

10.Is based on a write cycle that was initiated in accordance with the Write Cycle Descriptions table. NWS0, NWS1, BWS0, BWS1, BWS2, and BWS3 can be altered on different portions of a write cycle, as long as the setup and hold requirements are achieved.

Document Number: 38-05363 Rev. *F Page 11 of 32

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