ELANSC310 AMD [Advanced Micro Devices], ELANSC310 Datasheet - Page 87

• Manufacturer Part Number: ELANSC310
• Description: Single-Chip, 32-Bit, PC/AT Microcontroller
• Manufacturer: AMD [Advanced Micro Devices]

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.
AC Switching Test Waveforms
Notes:
For AC testing, inputs are driven at 3 V for a logic 1 and 0 V for a logic 0.
V
V
IL
IH
= 0
= VCC
WAVEFORMS
Input
VCC
2
INPUTS
Must be Steady
May Change from H to L
May Change from L to H
Don’t Care, Any Change Permitted
Does Not Apply
Figure 31. Key to Switching Waveforms
Élan™SC310 Microcontroller Data Sheet
P R E L I M I N A R Y
Test Points
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
Will be Changing from H to L
Will be Changing from L to H
Changing, State Unknown
Center Line is High-Impedance “Off” State
VCC
2
Output
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