MSM66579 datasheet(23/37 Pages) OKI

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PEDL66579-03

1Semiconductor

MSM66579 Family

23/37

AC Characteristics 2 (VDD = 2.4 to 3.6 V)

(1) Separate Bus Type

External program memory control

MSM66577L/579L (V

DD = 2.4 to 3.6 V, Ta = –30 to +70°C)

MSM66Q577L/Q579L (V

DD = 2.7 to 3.3 V, Ta = –30 to +70°C)

Parameter

Symbol

Condition

Min.

Max.

Unit

Cycle time

cyc

OSC = 14 MHz

71.4

—

Clock pulse width (HIGH level)

tφWH

—

Clock pulse width (LOW level)

tφWL

—

PSEN pulse width

2 t

φ – 20

—

PSEN pulse delay time

—75

Address setup time

φ – 40

—

Address hold time

018

Instruction setup time

—

Instruction hold time

0—

Read data access time

ACC

L = 50 pF

—3 t

φ – 120

Note: t

φ = t

cyc/2

INST0 to 7

PC0 to 19

Bus timing during no wait cycle time

cyc

tφ

CPUCLK

PSEN

A0 to A19

D0 to D7

tφ

ACC

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