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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

WED7PxxxATA70xxI25

July 2005

Rev. 1

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

AC CHARACTERISTICS

Attribute Memory Read AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

Read cycle time

250

—

ns

Address access time

—

250

CE# access time

—

250

OE# access time

—

125

Output disable time (CE#)

—

100

Output disable time (OE#)

—

100

Output enable time (CE#)

5

—

Output enable time (OE#)

5

—

Data valid time (A)

0

—

Address setup time

30

—

Attribute Memory Write AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

Write cycle time

250

—

ns

Write pulse time

150

—

Address setup time

30

—

Data setup time (-WE)

80

—

Data hold time

30

—

Write recover time

30

—

I/O Access Read AC Characteristics

SYMBOL

PARAMETER

MIN

MAX

UNIT

Data delay after IORD#

—

100

ns

Data hold following IORD#

0

—

IORD# pulse width

165

—

Address setup before IORD#

70

—

Address hold following IORD#

20

—

CE# setup before IORD#

5

—

CE# hold following IORD#

20

—

REG# setup before IORD#

5

—

REG# hold following -IORD

0

—

INPACK# delay failing from IORD#

0

45

INPACK# delay rising from IORD#

—

45

IOIS#16 delay failing from address

—

35

IOIS#16 delay rising from address

—

35