Техническая Спецификация для Freescale Semiconductor MC56F8006 Demo board MC56F8006DEMO MC56F8006DEMO
Модели
MC56F8006DEMO
Specifications
MC56F8006/MC56F8002 Digital Signal Controller, Rev. 4
Freescale Semiconductor
57
8.13
AC Electrical Characteristics
Tests are conducted using the input levels specified in
. Unless otherwise specified, propagation delays are measured
from the 50% to the 50% point, and rise and fall times are measured between the 10% and 90% points, as shown in
.
Figure 25. Input Signal Measurement References
shows the definitions of the following signal states:
•
Active state, when a bus or signal is driven, and enters a low impedance state
Table 28. Crystal Oscillator Characteristics
Characteristic
Symbol
Min
Typ
1
1
Data in Typical column was characterized at 3.0 V, 25
C or is typical recommended value.
Max
Unit
Oscillator crystal or resonator (PRECS = 1, CLK_MOD = 0)
Low range (RANGE = 0)
High range (RANGE = 1), high gain (COHL =0)
High range (RANGE = 1), low power (COHL =1)
High range (RANGE = 1), high gain (COHL =0)
High range (RANGE = 1), low power (COHL =1)
f
lo
f
hi
f
hi
32
1
1
1
—
—
—
—
—
38.4
16
8
kHz
MHz
MHz
MHz
Load capacitors
Low range (RANGE=0), low power (COHL =1)
Other oscillator settings
Other oscillator settings
C
1,
C
2
See Note
2
See Note
3
2
Load capacitors (C
1
,C
2
), feedback resistor (R
F
) and series resistor (R
S
) are incorporated internally when
RANGE=HGO=0.
3
See crystal or resonator manufacturer’s recommendation.
Feedback resistor
Low range, low power (RANGE=0, COHL =1)
Low range, high gain (RANGE=0, COHL =0)
High range (RANGE=1, COHL=X)
High range (RANGE=1, COHL=X)
R
F
—
—
—
—
—
—
10
1
—
—
—
—
—
M
Series resistor
Low range, low power (RANGE = 0, COHL =1)
Low range, high gain (RANGE = 0, COHL =0)
High range, low power (RANGE = 1, COHL =1)
High range, high gain (RANGE = 1,COHL =0)
High range, low power (RANGE = 1, COHL =1)
High range, high gain (RANGE = 1,COHL =0)
8 MHz
4 MHz
1 MHz
4 MHz
1 MHz
R
S
—
—
—
—
—
—
—
—
—
—
0
100
0
0
0
0
0
0
—
—
—
—
—
0
10
20
20
k
Crystal start-up time
4
Low range, low power
Low range, high gain
High range, low power
High range, high gain
Low range, high gain
High range, low power
High range, high gain
4
Proper PC board layout procedures must be followed to achieve specifications.
t
CSTL
t
CSTH
—
—
—
—
—
—
—
TBD
TBD
TBD
TBD
TBD
TBD
TBD
—
—
—
—
—
—
—
ms
Square wave input clock frequency (PRECS = 1, CLK_MOD = 1)
f
xtal
—
—
50.0
MHz
V
IH
V
IL
Fall Time
Midpoint1
Low
High
90%
50%
10%
Rise Time
The midpoint is V
IL
+ (V
IH
– V
IL
)/2.
Input Signal