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Prelminary
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
V
IL
0 V
Load condition
C
55 pF
(1) Clock
Parameter
Input clock frequency
Internal operating clock frequency
(FR70E/peripheral module)
Internal operating clock frequency
(USBC)
Internal operating clock frequency
(I
2
C IF)
External memory clock frequency
* : The clock frequency must be set to over 25 MHz for the Ethernet MAC interface to perform 100 Base
communication.
XINI
OSCEA/OSCEB
VCC
V
IH
0 V
V
V
0.8
IH
DDE
V
V
0.2
IL
DDE
Symbol
Pin
Conditions
Fclkcyc
XINI
External clock
OSCEA,
Fclkcyc
Oscillation
OSCEB
Fclkin
Fusop
Fi2op
MCLKO
Fclkcyc
Output
V
OH
V
OL
V
V
/2
OH
DDE
V
V
/2
OL
DDE
Value
Min
Max
10.0
50.0
10.0
50.0
50.0
48.0
12.5
50.0
MB91401
VCC
Unit
Remarks
MHz
MHz
MHz
*
MHz
MHz
MHz
53
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