FUJITSU MB91401 User Manual
Page 53
MB91401
53
4.
AC Characteristics
The following measurement conditions depending on the supply voltage apply to the MB91401 unless otherwise
specified.
(1) Clock
* : The clock frequency must be set to over 25 MHz for the Ethernet MAC interface to perform 100 Base
communication.
Parameter
Symbol
Pin
Conditions
Value
Unit
Remarks
Min
Max
Input clock frequency
Fclkcyc
XINI
External clock
10.0
50.0
MHz
Fclkcyc
OSCEA,
OSCEB
Oscillation
10.0
50.0
MHz
Internal operating clock frequency
(FR70E/peripheral module)
Fclkin
50.0
MHz
*
Internal operating clock frequency
(USBC)
Fusop
48.0
MHz
Internal operating clock frequency
(I
2
C IF)
Fi2op
12.5
MHz
External memory clock frequency
MCLKO
50.0
MHz
•
AC measurement condition
•
Load condition
V
IH
V
DDE
×
0.8
V
OH
V
DDE
/2
V
IL
V
DDE
×
0.2
V
OL
V
DDE
/2
0 V
VCC
V
IL
V
IH
0 V
VCC
V
OL
V
OH
Input
Output
C
=
55 pF
XINI
OSCEA/OSCEB
Fclkcyc
Prelminary
2004.11.12