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3 ac characteristics, 1 ebi/sdram interface ac characteristics, 2 ebi/external master interface ac characteristics – Rainbow Electronics W90N740 User Manual

Page 201

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W90N740

Publication Release Date: November 26, 2004

- 197 -

Revision A4

8.3 AC

Characteristics

8.3.1 EBI/SDRAM Interface AC Characteristics

MCLK

D[31:0]

Input Valid

1.5V

1.5V

1.5V

T

DSU

T

DH

MCLK

Output

Delay

Output Valid

1.5V

1.5V

T

DO

SYM. PARAMETER MIN.

MAX.

UNIT

T

DSU

D [31:0] Setup Time

2

nS

T

DH

D [31:0] Hold Time

3

nS

T

DO

D [31:0], A [24:0], nSCS [1:0], SDQM [3:0], CKE, nSWE, nSRAS, nSCAS

2

7

nS

8.3.2 EBI/External Master Interface AC Characteristics

MCLK

T

EMSU

EMREQ

EMACK

T

EMAO

T

EMH

T

EMAO

SYM. DESCRIPTION

MIN.

MAX.

UNIT

T

EMSU

EMREQ Setup Time

2

nS

T

EMH

EMREQ Hold Time

3

nS

T

EMAO

EMACK Output Delay Time

4

7

nS