MB90F548GPF datasheet(42/67 Pages) FUJITSU

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MB90540/540G/545/545G Series

AC Characteristics

(1) Clock Timing

(MB90F543/F549: VCC

= 5.0 V±10%, VSS = AVSS = 0.0 V, TA = −40 °C to +85 °C)

(MB90543G(S)/547G(S)/548G(S)/F548GL(S): VCC

= 3.5 V to 5.5 V, VSS = AVSS = 0.0 V, TA = −40 °C to +105 °C)

(Other than MB90F543/F549/543G(S)/547G(S)/548G(S)/F548GL(S):

VCC

= 5.0 V ± 10%, VSS = AVSS = 0.0 V, TA = −40 °C to +105 °C)

Parameter

Symbol

Pin name

Value

Units

Remarks

Min

Typ

Max

Oscillation frequency

X0, X1



MHz VCC

= 5.0 V±10%



5MHz

VCC

<4.5 (MB90F548GL(S)/

543G(S)/547G(S)/548G(S))

fCL

X0A, X1A



32.768



kHz

Oscillation cycle time

tCYL

X0, X1

62.5



333

VCC

= 5.0 V±10%

200



333

VCC

<4.5 (MB90F548GL(S)/

543G(S)/547G(S)/548G(S))

tLCYL

X0A, X1A



30.5

µs

Input clock pulse width

PWH, PWL



Duty ratio is about 30

% to

PWLH, PWLL

X0A



15.2

µs

Input clock rise and fall

time

tCR, tCF



When using external clock

Machine clock frequency

fCP



1.5



MHz When using main clock

fLCP



8.192



kHz

When using sub-clock

Machine clock cycle time

tCP



62.5



666

When using main clock

tLCP



122.1

µs

When using sub-clock

tCYL

tCF

tCR

0.8 VCC

0.2 VCC

PWH

PWL

X0A

tLCYL

tCF

tCR

0.8 VCC

0.2 VCC

PWLH

PWLL

• Clock Timing

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