參數(shù)資料
型號(hào): DSP5685xUM
廠(chǎng)商: 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述: 16-bit Digital Signal Controllers
中文描述: 16位數(shù)字信號(hào)控制器
文件頁(yè)數(shù): 29/60頁(yè)
文件大?。?/td> 836K
代理商: DSP5685XUM
AC Electrical Characteristics
56854 Technical Data, Rev. 6
Freescale Semiconductor
29
Figure 4-3 Example Circuit to Control Supply Sequencing
4.4 AC Electrical Characteristics
Timing waveforms in
Section 4.2
are tested with a V
IL
maximum of 0.8 V and a V
IH
minimum of 2.0 V
for all pins except XTAL, which is tested using the input levels in
Section 4.2
.
In
Figure 4-4
the levels of
V
IH
and V
IL
for an input signal are shown.
Figure 4-4 Input Signal Measurement References
Figure 4-5
shows the definitions of the following signal states:
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.
Data Valid state, when a signal level has reached V
OL
or V
OH.
Data Invalid state, when a signal level is in transition between V
OL
and V
OH.
Figure 4-5 Signal States
3.3V
Regulator
1.8V
Regulator
Supply
V
DD
V
DDIO,
V
DDA
V
IH
V
IL
Fall Time
Input Signal
Note: The midpoint is V
IL
+ (V
IH
– V
IL
)/2.
Midpoint1
Low
High
90%
50%
10%
Rise Time
Data Invalid State
Data1
Data2 Valid
Data
Tri-stated
Data3 Valid
Data2
Data3
Data1 Valid
Data Active
Data Active
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