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ELANSC300-33KI Datasheet

  • ELANSC300-33KI

  • Highly Integrated, Low-Power, 32-Bit Microcontroller

  • 1344.13KB

  • 139页

  • AMD

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P R E L I M I N A R Y
AC SWITCHING CHARACTERISTICS AND WAVEFORMS
The AC specifications provided in the AC characteris-
tics tables that follow consist of output delays, input
setup requirements, and input hold requirements. Fig-
ure 31 provides a key to the switching waveforms.
AC specifications measurement is defined by the fig-
ures that follow each timing table.
Output delays are specified with minimum and maxi-
mum limits, measured as shown. The minimum delay
times are hold times provided to external circuitry.
Input setup and hold times are specified as minimums,
defining the smallest acceptable sampling window.
Within the sampling window, a synchronous input sig-
nal must be stable for correct microcontroller operation.
OUTPUTS
Will be Steady
WAVEFORMS
INPUTS
Must be Steady
May Change from H to L
Will be Changing from H to L
May Change from L to H
Will be Changing from L to H
Don鈥檛 Care, Any Change Permitted
Changing, State Unknown
Does Not Apply
Center Line is High-Impedance 鈥淥ff鈥?State
Figure 31. Key to Switching Waveforms
AC Switching Test Waveforms
V
IH
= VCC
VCC
梅
2
Test Points
VCC
梅
2
V
IL
= 0
Input
Output
Notes:
AC Testing: Inputs are driven at 3 V for a logic 1 and 0 V for a logic 0.
98
脡lan鈩C300 Microcontroller Data Sheet

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