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HMS99C52 Datasheet(PDF) 39 Page - Hynix Semiconductor

Part # HMS99C52
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  43 Pages
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Manufacturer  HYNIX [Hynix Semiconductor]
Direct Link  http://www.skhynix.com/kor/main.do
Logo HYNIX - Hynix Semiconductor

HMS99C52 Datasheet(HTML) 39 Page - Hynix Semiconductor

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HMS99C5X Series
Jan. 2003 Ver 1.0
35
Figure 9. AC Testing: Input, Output Waveforms
Figure 10. Float Waveforms
Figure 11. External Clock Cycle
AC Inputs during testing are driven at VCC−0.5V for a logic ‘1’ and 0.45V for a logic ‘0’.
0.2VCC + 0.9
0.2VCC − 0.1
Test Points
VCC−0.5V
0.45V
Timing measurements are made a VIHmin for a logic ‘1’ and VILmax for a logic ‘0’.
VLOAD + 0.1
VLOAD − 0.1
Timing Reference Points
0.2VCC − 0.1
VOH − 0.1
VOL + 0.1
VLOAD
For timing purposes a port pin is no longer floating when a 100mV change from load voltage
IOL / IOH ≥ 20mA.
occurs and begins to float when a 100mV change from the loaded VOH / VOL level occurs.
tCHCL
tCLCH
tCHCX
tCLCL
tCLCX
0.2 VCC −0.1
0.7 VCC
VCC−0.5V
0.45V



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