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Memory bus read access – AMD Am79C930 User Manual

Page 139

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P R E L I M I N A R Y

AMD

139

Am79C930

AC CHARACTERISTICS

3.3 V MEMORY BUS INTERFACE

ABSOLUTE MAXIMUM RATINGS

Storage Temperature:

–65 to +150

°

C

. . . . . . . . . . . .

Ambient Temperature Under Bias:

–65 to +125

°

C

. . .

Supply Voltage to AV

SS

or DV

SS

(AV

DD

, DV

DD

):

–0.3 to +6 V

. . . . . . . . . . . . . .

Stresses above those listed under Absolute Maximum
Ratings may cause permanent device failure. Functionality at
or above these limits is not implied. Exposure to Absolute
Maximum Ratings for extended periods may affect
device reliability.

OPERATING RANGES

Commercial (C) Devices

Temperature (T

A

)

0

°

C to + 70

°

C

. . . . . . . . . . . . . . . . .

Supply Voltages (V

CC

,V

DDT

, V

DDU1

, V

DDU2

, V

DDM

, V

DDP

)

3.0 V to 5.25 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply Voltages
(AV

DD

, V

DD5

)

+5 V

±

5%

. . . . . . . . . . . . . . . . . . . . . . . .

All inputs within the range: V

SS

– 0.5 V

V

IN

V

DD

+ 0.1 X

V

DD

– where V

SS

and V

DD

are appropriate reference pins

for a given input pin. (See section on power supply
pin descriptions.)

CL = 50 pF unless otherwise noted

Operating ranges define those limits between which the func-
tionality of the device is guaranteed.

MEMORY BUS READ ACCESS

Parameter

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

t

m

AD

MA[16:0] valid from CLKIN

2

100

ns

t

m

CD

CE

active delay from CLKIN

Note 1

2

100

ns

t

m

OD

MOE

active delay from CLKIN

2

100

ns

t

m

OLZ

MOE

to MD[7:0] driven

0 wait states

0

70

ns

(Note 3)

1 wait state

170

ns

2 wait states

270

ns

t

m

AA

Address Read Access Time

0 wait states

120

ns

(Note 3)

1 wait state

220

ns

2 wait states

320

ns

t

m

ACS

CE

Read Access Time

0 wait states

120

ns

(Notes 1, 3)

1 wait state

220

ns

2 wait states

320

ns

t

m

OE

MOE

Read Access Time

0 wait states

70

ns

(Note 3)

1 wait state

170

ns

2 wait states

270

ns

t

m

RI

CE

Inactive Time

Notes 1, 2

0

ns

t

m

AH

MA[16:0] valid hold from

MOE

Note 1

T

CLKIN

-10

ns

t

m

CH

CE

valid hold from

MOE

T

CLKIN

-10

ns

t

m

H

MD[7:0] valid hold from

MOE

Note 2

0

ns

t

m

HZ

MD[7:0] inactive from

MOE

Note 2

0

2 X T

CLKIN

-15

ns

Notes:

1.

CE

= one of:

FCE

,

SCE

,

XCE

2. Parameter not included in the production test.

3. Value is dependent upon TCLKIN value. Value given is for CLKIN = 20 MHz.