dsp56f802ta80 Freescale Semiconductor, Inc, dsp56f802ta80 Datasheet - Page 18

• Manufacturer Part Number: dsp56f802ta80
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

3.3 AC Electrical Characteristics
Timing waveforms in
table. In
Figure 3-3
18
10. Power
this signal remains active for as long as the internal 2.5V is below 1.5V typical no matter how long the ramp up rate is. The internally
regulated voltage is typically 100 mV less than V
•
•
Input Signal
Active state, when a bus or signal is driven, and enters a low impedance state
Tri-stated, when a bus or signal is placed in a high impedance state
Note: The midpoint is V
Figure 3-2
120
160
40
80
–
on reset occurs whenever the internally regulated 2.5V digital supply drops below 1.5V typical. While power is ramping up,
Figure 3-1 Maximum Run IDD vs. Frequency (see Note 6. in
0
shows the definitions of the following signal states:
the levels of V
Section 3.3
IDD Digital
10
Figure 3-2 Input Signal Measurement References
Fall Time
IL
+ (V
Midpoint1
IH
are tested using the V
V
20
– V
IH
IH
IDD Analog
and V
IL
DD
)/2.
56F802 Technical Data, Rev. 9
during ramp up until 2.5V is reached, at which time it self regulates.
IL
30
for an input signal are shown.
IDD Total
Low
V
Freq. (MHz)
IL
IL
40
and V
IH
levels specified in the DC Characteristics
50
Rise Time
High
60
Table
Freescale Semiconductor
70
90%
50%
10%
3-4)
80