Freescale Semiconductor Eval, Demo and Development Board for MCF51MM256 TWR-MCF51MM TWR-MCF51MM Data Sheet
Product codes
TWR-MCF51MM
Electrical Characteristics
Freescale Semiconductor
42
3.12 AC Characteristics
This section describes ac timing characteristics for each peripheral system.
3.12.1
Control Timing
Table 21. Control Timing
#
Symbol
Parameter
Min
Typical
1
Max
C
Unit
1
f
Bus
Bus frequency (t
cyc
= 1/f
Bus
)
MHz
V
DD
1.8 V
dc
—
10
D
V
DD
> 2.1 V
dc
—
20
D
V
DD
> 2.4 V
dc
—
25.165
D
2
t
LPO
Internal low-power oscillator
period
period
700
1000
1300
P
s
3
t
extrst
External reset pulse width
2
(t
cyc
= 1/f
Self_reset
)
100
—
—
D
ns
4
t
rstdrv
Reset low drive
66 x t
cyc
—
—
D
ns
5
t
MSSU
Active background debug
mode latch setup time
mode latch setup time
500
—
—
D
ns
6
t
MSH
Active background debug
mode latch hold time
mode latch hold time
100
—
—
D
ns
7
t
ILIH,
t
IHIL
IRQ pulse width
•
•
Asynchronous path
2
•
Synchronous path
3
100
1.5 x t
cyc
—
—
D
ns
8
t
ILIH,
t
IHIL
KBIPx pulse width
•
•
Asynchronous path
2
•
Synchronous path
3
100
1.5 x t
cyc
—
—
D
ns
MCF51MM256/128, Rev. 5