MSM85C154HVS Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM85C154HVS

MSM83C154S Piggy Back

Oki Electric Industry 

¡ Semiconductor

MSM85C154HVS

AC Characteristics

External program memory access AC characteristics

VCC = 4.75 to 5.25V, VSS = 0V, Ta = room temp

PORT 0, ALE, and PSEN connected with 100 pF load, other connected with 80 pF load

Parameter

Symble

Variable clock from*1

1 to 22 MHz

Unit

Min.

Max.

XTAL1, XTAL 2 Oscillation Cycle

ALE Signal Width

Address Setup Time

(to ALE Falling Edge)

tCLCL

tLHLL

tAVLL

45.5

2tCLCL-40

1tCLCL-15

1000

ns

—

ns

—

ns

Address Hold Time

(from ALE Falling Edge)

tLLAX

1tCLCL-35

—

ns

Instruction Data Read Time

(from ALE Falling Edge)

From ALE Falling Edge to PSEN

Falling Edge

PSEN Signal Width

Instruction Data Read Time

(from PSEN Falling Edge)

tLLPL

tLLPL

tPLPH

tPLIV

—

1tCLCL-30

3tCLCL-35

—

4tCLCL-100

ns

—

ns

—

ns

3tCLCL-45

ns

Instruction Data Hold Time

(from PSEN Rising Edge)

tPXIX

0

—

ns

Bus Floating Time after Instruction

Data Read (from PSEN Rising Edge)

tPXIZ

—

1tCLCL-20

ns

Instruction Data Read Time

(from Address Output)

Bus Floating Time(PSEN Rising

Edge from Address float)

Address Output Time from PSEN

Rising Edge

tAVIV

tAZPL

tPXAV

—

0

1tCLCL-20

5tCLCL-105

ns

—

ns

—

ns

*1 The variable check is from 0 to 22 MHz when the external check is used.

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