MB91155 datasheet(85/105 Pages) FUJITSU

85 / 105 page

MB91F155A/MB91155/MB91154

AC Characteristics

(1) Clock Timing Ratings

(VCC

= 3.15 V to 3.6 V, VSS = AVSS = 0 V, TA = 0 °C to +70 °C)

*1 : The target analog section is the A/D.

*2 : The maximum external bus operating frequency allowed is 25 MHz.

*3 : The value when a minimum clock frequency of 10 MHz is input to X0 and half a division of the oscillator circuit

and the 1/8 gear are in use.

Parameter

Sym-

bol

name

Condition

Value

Unit

Remarks

Min

Max

Clock frequency

(High speed and self

oscillation)

X0, X1



16.5

MHz

Range in which self

oscillation is allowed

Clock frequency

(High speed and PLL in use)



Range in which self

oscillation and the

use of the PLL for

external clock input

are allowed

Clock frequency

(High speed an 1/2 division

input)



MHz

Range in which

external clocks can

be input

Clock frequency

(For calendar macro)

fCA

X0A,

X1A



kHz

Self oscillation and

external clocks

Clock cycle time

X0, X1



55.6

100

Clock pulse width

PWH

X0, X1



PWL



Input clock rising

tcr

X0, X1



8(tcr + tcf)

Input clock falling

tcf



Internal

operating clock

frequency

CPU

system

fCP



One wait is

set with the

wait

controller.

0.625*3

MHz

Bus

system

fCPB

0.625*3

25*2

Peripheral

system

fCPP

0.625*3

Analog section

excluded. *1

Analog section *1

Internal operat-

ing clock cycle

time

CPU

system

tCP



30.3

1600*3

Bus

system

tCPB

40*2

1600*3

Peripheral

system

tCPP

30.3

1600*3

Analog section

excluded. *1

30.3

1000

section *1

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