Cypress CY7C1310AV18, CY7C1312AV18 manual Write Cycle Descriptions CY7C1314AV18 2, Bws, Comments

	CY7C1310AV18
PRELIMINARY	CY7C1312AV18
	CY7C1314AV18

Write Cycle Descriptions (CY7C1310AV18 and CY7C1312AV18) [2, 8]

BWS0	BWS1	K	K	Comments
L	L	L-H	–	During the Data portion of a Write sequence :
				CY7C1310AV18 − both nibbles (D[7:0]) are written into the device,
				CY7C1312AV18 − both bytes (D[17:0]) are written into the device.
L	L	–	L-H	During the Data portion of a Write sequence :
				CY7C1310AV18 − both nibbles (D[7:0]) are written into the device,
				CY7C1312AV18 − both bytes (D[17:0]) are written into the device.
L	H	L-H	–	During the Data portion of a Write sequence :
				CY7C1310AV18 − only the lower nibble (D[3:0]) is written into the device. D[7:4] will remain unaltered,
				CY7C1312AV18 − only the lower byte (D[8:0]) is written into the device. D[17:9] will remain unaltered.
L	H	–	L-H	During the Data portion of a Write sequence :
				CY7C1310AV18 − only the lower nibble (D[3:0]) is written into the device. D[7:4] will remain unaltered,
				CY7C1312AV18 − only the lower byte (D[8:0]) is written into the device. D[17:9] will remain unaltered.
H	L	L-H	–	During the Data portion of a Write sequence :
				CY7C1310AV18 − only the upper nibble (D[7:4]) is written into the device. D[3:0] will remain unaltered,
				CY7C1312AV18 − only the upper byte (D[17:9]) is written into the device. D[8:0] will remain unaltered.
H	L	–	L-H	During the Data portion of a Write sequence :
				CY7C1310AV18 − only the upper nibble (D[7:4]) is written into the device. D[3:0] will remain unaltered,
				CY7C1312AV18 − only the upper byte (D[17:9]) is written into the device. D[8:0] will remain 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 (CY7C1314AV18) [2, 8]

BWS0	BWS1	BWS2	BWS3	K	K	Comments
L	L	L	L	L-H	-	During the Data portion of a Write sequence, all four bytes (D[35:0]) are written into
						the device.
L	L	L	L	-	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] will remain 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] will 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] will 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] will 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] will 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] will 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] will 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] will remain unaltered.
H	H	H	H	L-H	-	No data is written into the device during this portion of a write operation.
H	H	H	H	-	L-H	No data is written into the device during this portion of a write operation.

Document #: 38-05497 Rev. *A Page 8 of 21

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