Fujitsu MB91401 AC Characteristics, Clock, Prelminary, 2004.11.12, Parameter, Symbol, Conditions

Prelminary	MB91401
2004.11.12

4. AC Characteristics

The following measurement conditions depending on the supply voltage apply to the MB91401 unless otherwise specified.

• AC measurement condition
	Input			VCC		Output
									VCC
	VIL		VIH			VOL		VOH
0 V					0 V
		VIH		VDDE ⋅ 0.8	VOH		VDDE/2
		VIL		VDDE ⋅ 0.2	VOL		VDDE/2
• Load condition
C = 55 pF

(1) Clock

Parameter	Symbol	Pin	Conditions		Value		Unit	Remarks
				Min		Max
	Fclkcyc	XINI	External clock	10.0		50.0	MHz
Input clock frequency
	Fclkcyc	OSCEA,	Oscillation	10.0		50.0	MHz
		OSCEB
Internal operating clock frequency	Fclkin					50.0	MHz	*
(FR70E/peripheral module)
Internal operating clock frequency	Fusop					48.0	MHz
(USBC)
Internal operating clock frequency	Fi2op					12.5	MHz
(I2C IF)
External memory clock frequency		MCLKO				50.0	MHz

*: The clock frequency must be set to over 25 MHz for the Ethernet MAC interface to perform 100 Base communication.

Fclkcyc

XINI

OSCEA/OSCEB

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