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Cypress CY7C1460AV33 User Manual

Page 9

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CY7C1460AV33
CY7C1462AV33
CY7C1464AV33

Document #: 38-05353 Rev. *D

Page 9 of 27

Write Cycle
(Begin Burst)

External

L

L

L

L

L

X

L

L-H

Data In (D)

Write Cycle
(Continue Burst)

Next

X

L

H

X

L

X

L

L-H

Data In (D)

NOP/WRITE ABORT
(Begin Burst)

None

L

L

L

L

H

X

L

L-H

Tri-State

WRITE ABORT
(Continue Burst)

Next

X

L

H

X

H

X

L

L-H

Tri-State

IGNORE CLOCK
EDGE
(Stall)

Current

X

L

X

X

X

X

H

L-H

-

SLEEP MODE

None

X

H

X

X

X

X

X

X

Tri-State

Truth Table

[1, 2, 3, 4, 5, 6, 7]

(continued)

Operation

Address

Used

CE

ZZ

ADV/LD

WE

BW

x

OE

CEN

CLK

DQ

Partial Write Cycle Description

[1, 2, 3, 8]

Function (CY7C1460AV33)

WE

BW

d

BW

c

BW

b

BW

a

Read

H

X

X

X

X

Write – No bytes written

L

H

H

H

H

Write Byte a – (DQ

a

and

DQP

a

)

L

H

H

H

L

Write Byte b – (DQ

b

and

DQP

b

)

L

H

H

L

H

Write Bytes b, a

L

H

H

L

L

Write Byte c – (DQ

c

and

DQP

c

)

L

H

L

H

H

Write Bytes c, a

L

H

L

H

L

Write Bytes c, b

L

H

LL

L

H

Write Bytes c, b, a

L

H

L

L

L

Write Byte d – (DQ

d

and

DQP

d

)

L

L

H

H

H

Write Bytes d, a

L

L

H

H

L

Write Bytes d, b

L

L

H

L

H

Write Bytes d, b, a

L

L

H

L

L

Write Bytes d, c

L

L

L

H

H

Write Bytes d, c, a

L

L

L

H

L

Write Bytes d, c, b

L

L

L

L

H

Write All Bytes

L

L

L

L

L

Function (CY7C1462AV33)

[2,8]

WE

BW

b

BW

a

Read

H

x

x

Write – No Bytes Written

L

H

H

Write Byte a – (DQ

a

and

DQP

a

)

L

H

L

Write Byte b – (DQ

b

and

DQP

b

)

L

L

H

Write Both Bytes

L

L

L

Function (CY7C1464AV33)

[2,8]

WE

BW

x

Read

H

x

Write – No Bytes Written

L

H

Write Byte X

− (DQ

x

and

DQP

x)

L

L

Write All Bytes

L

All BW = L

Note:

8. Table only lists a partial listing of the byte write combinations. Any combination of BW

[a:d]

is valid. Appropriate write will be done based on which byte write is active.

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