F497 查看數據表（PDF） - Fujitsu

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F497

16-bit Proprietary Microcontroller

Fujitsu 

MB90495 Series

14.5 External Bus Timing (Read)

Parameter

Symbol

Pin

ALE pulse width

Valid address ⇒ ALE ↓ time

ALE ↓ ⇒ Address valid time

Valid address ⇒ RD ↓ time

Valid address ⇒ Valid data

input

RD pulse width

RD ↓ ⇒ Valid data input

RD ↑ ⇒ Data hold time

RD ↓ ⇒ ALE ↑ time

RD ↑ ⇒ Address valid time

Valid address ⇒ CLK ↑ time

RD ↓ ⇒ CLK ↑ time

ALE ↓ ⇒ RD ↓ time

tLHLL

tAVLL

tLLAX

tAVRL

tAVDV

tRLRH

tRLDV

tRHDX

tRHLH

tRHAX

tAVCH

tRLCH

tLLRL

ALE

ALE,

A23 - A16,

AD15 - AD00

ALE,

AD15 - AD00

A23 - A16,

AD15 - AD00,

RD

A23 - A16,

AD15 - AD00

RD

RD,

AD15 - AD00

RD,

AD15 - AD00

RD, ALE

RD,

A23 - A16

A23 - A16,

AD15 - AD00,

CLK

RD, CLK

ALE, RD

Test Condition

—

(TA = –40 to +85°C, VCC = 4.5 to 5.5 V, VSS = 0 V)

Rated Value

Min.

Max.

Units Remarks

tCP/2 – 20

ns

tCP/2 – 20

—

ns

tCP/2 – 15

—

ns

tCP – 15

—

ns

—

5 tCP/2 – 60 ns

3 tCP/2 – 20

—

ns

—

3 tCP/2 – 60 ns

0

—

ns

tCP/2 – 15

—

ns

tCP/2 – 10

—

ns

tCP/2 – 20

—

ns

tCP/2 – 20

—

ns

tCP/2 – 15

—

ns

MB90495 Series Data Sheet (Advance Information) 28 / 40

FMG EMDC June 19, 2000

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