MB89P677APFM View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB89P677APFM

8-bit Proprietary Microcontroller

Fujitsu 

MB89670/A Series

(8) Bus Write Timing

Parameter

Valid address → ALE

↓ time

ALE ↓ time →

Address loss time

Valid address → WR ↓ time

WR pulse width

Writing data → WR ↑ time

WR ↑ → Address loss time

WR ↑ → Data hold time

WR ↑ → ALE ↑ time

WR ↓ → CLK ↑ time

CLK ↓ → WR ↑ time

ALE pulse width

ALE ↓ → CLK ↑ time

(AVCC = VCC = +5.0 V±10%, AVSS = VSS = 0.0 V, TA = –40°C to +85°C)

Value

Symbol

Pin

Condition

Unit Remarks

Min.

Max.

tAVLL

AD7 to 0, ALE,

A15 to 08

1/4 tinst* 2 – 0.064

—

µs

tLLAX

AD7 to 0, ALE,

A15 to 08

5*1

—

ns

tAVWL

WR, ALE

1/4 tinst* 2 – 0.06

—

µs

tWLWH

WR

1/2 tinst* 2 – 0.02

—

µs

tDVWL

AD7 to 0, WR

1/2 tinst* 2 – 0.06

—

ns

tWHAX

WR, A15 to 08

—

1/4 tinst* 2 – 0.04

—

µs

tWHDX

AD7 to 0, WR

1/4 tinst* 2 – 0.04

—

µs

tWHLH

WR, ALE

1/4 tinst* – 0.04

—

µs

tWLCH

WR, CLK

1/4 tinst* 2 – 0.04

—

µs

tCLWH

WR, CLK

0

—

ns

tLHLL

ALE

1/4 tinst* 2 – 0.035

—

µs

tLLCH

ALE, CLK

1/4 tinst* 2 – 0.03

—

µs

*1: These characteristics are also applicable to the bus read timing.

*2: For information on tinst, see “(4) Instruction Cycle.”

CLK

ALE

AD

A

WR

2.4 V

tLHLL

tLLCH

2.4 V

0.8 V

tAVLL

2.4 V 2.4 V

tLLAX

2.4 V

0.8 V 0.8 V

2.4 V

0.8 V

tAVWL

0.8 V

tDVWH

tWLCH

tWLWH

0.8 V

0.8 V

tWHLH

0.8 V

2.4 V

0.8 V

tWHDX

2.4 V

tCLWH

0.8 V

tWHAX

2.4 V

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