FUJITSU MB91401 - 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