Cypress CY62157CV33 Manuel d'utilisateur télécharger pdf (Page 10)

CY62157CV30/33

Document #: 38-05014 Rev. *F Page 10 of 13

Write Cycle No. 4 (BHE/BLE Controlled, OE LOW)

[19]

Truth Table

CE

1

CE

2

WE OE BHE BLE Inputs/Outputs Mode Power

H X X X X X High Z Deselect/Power-Down Standby (I

SB

)

X L X X X X High Z Deselect/Power-Down Standby (I

SB

)

X X X X H H High Z Deselect/Power-Down Standby (I

SB

)

L H H L L L Data Out (I/O

O

–I/O

15

) Read Active (I

CC

)

L H H L H L Data Out (I/O

O

–I/O

7

);

I/O

8

–I/O

15

in High Z

Read Active (I

CC

)

L H H L L H Data Out (I/O

8

–I/O

15

);

I/O

0

–I/O

7

in High Z

Read Active (I

CC

)

L H H H L L High Z Output Disabled Active (I

CC

)

L H H H H L High Z Output Disabled Active (I

CC

)

L H H H L H High Z Output Disabled Active (I

CC

)

L H L X L L Data In (I/O

O

–I/O

15

) Write Active (I

CC

)

L H L X H L Data In (I/O

O

–I/O

7

);

I/O

8

–I/O

15

in High Z

Write Active (I

CC

)

L H L X L H Data In (I/O

8

–I/O

15

);

I/O

0

–I/O

7

in High Z

Write Active (I

CC

)

Switching Waveforms (continued)

DATA I/O

ADDRESS

t

HD

t

SD

t

SA

t

HA

t

AW

t

WC

CE

1

WE

DATA

IN

VALID

NOTE 20

t

BW

BHE/BLE

t

SCE

CE

2

t

PWE

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