Maxim-integrated DS80C390 Manuel d'utilisateur télécharger pdf (Page 35)

DS80C390

35 of 58 110199

MULTIPLEXED EXTERNAL PROGRAM MEMORY READ CYCLE

MOVX CHARACTERISTICS (Multiplexed address/data bus)

PARAMETER SYMBOL MIN MAX UNITS STRETCH

VALUES

(MD2:0)

LHLL2

0.375 t

MCS

-5 ns C

= 0

0.5 t

MCS

-5

1≤ C

≤ 3

MOVX ALE Pulse Width

1.5 t

MCS

-10 ns

4 ≤ C

≤ 7

AVLL2

0.125 t

MCS

-5 ns C

= 0

0.25t

MCS

-5

1≤ C

≤ 3

Port 0 MOVX Address,

4CE0 − , 4PCE0− Valid to

ALE Low 1.25 t

MCS

-10

4 ≤ C

≤ 7

LLAX2

0.125 t

MCS

-5 ns

0≤ C

≤3

Address Hold after MOVX

Read/Write

1.125 t

MCS

-5 ns

4 ≤ C

≤ 7

RD Pulse Width

RLRH

0.5 t

MCS

-5 ns C

•t

MCS

-10 1 ≤ C

≤ 7

WR Pulse Width

WLWH

0.5 t

MCS

-5 ns C

•t

MCS

-10 1 ≤ C

≤ 7

RD Low to Valid Data In

RLDV

0.5 t

MCS

-20 ns C

•t

MCS

-20 1 ≤ C

≤ 7

Data Hold after Read t

RHDX

0 ns

Data Float after Read t

RHDZ

0.25 t

MCS

-5 ns C

= 0

0.5t

MCS

-5

1≤ C

≤ 3

1.5 t

MCS

-5

4 ≤ C

≤ 7

ALE Low to Valid Data In t

LLDV

0.625 t

MCS

-20 ns C

= 0

+0.25)•t

MCS

-40 1≤ C

≤ 3

+1.25)

•

MCS

-40 4 ≤ C

≤ 7

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 57 58

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Maxim-integrated DS80C390 Manuel d'utilisateur Page 35

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