dsp56824 Freescale Semiconductor, Inc, dsp56824 Datasheet - Page 21

• Manufacturer Part Number: dsp56824
• Description: 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

3.3 AC Electrical Characteristics
(V
Timing waveforms in Section 3.3, “AC Electrical Characteristics,” are tested with a V
V and a V
Section 3.2, “DC Electrical Characteristics.” Figure 3 shows the levels of V
Figure 4 shows the definitions of the following signal states:
Input Signal
SS
Note: The midpoint is V
•
•
•
•
= 0 V, V
Data Invalid State
Active state, when a bus or signal is driven , and enters a low impedance state.
Tristated, when a bus or signal is placed in a high impedance state.
Data Valid state, when a signal level has reached V
Data Invalid state, when a signal level is in transition between V
IH
Data1 Valid
minimum of 2.0 V for all pins except EXTAL, which is tested using the input levels in
DD
Data1
= 2.7–3.6 V, T
Figure 3. Input Signal Measurement References
Fall Time
IL
Data Active
+ (V
Midpoint1
Freescale Semiconductor, Inc.
For More Information On This Product,
IH
V
A
– V
IH
= –40 to +85 C, C
IL
)/2.
Data2 Valid
Figure 4. Signal States
DSP56824 Technical Data
Go to: www.freescale.com
Data2
Low
V
IL
L
= 50 pF)
Pulse Width
OL
Tristated
Data
orV
OH.
Rise Time
OL
High
AC Electrical Characteristics
and V
IH
and V
Data3 Valid
Data3
Data Active
OH.
IL
IL
for an input signal.
maximum of 0.8
90%
50%
10%
AA1448
AA1447
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