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83C51KB Fiches technique(PDF) 18 Page - Intel Corporation

No de pièce 83C51KB
Description  HIGH PERFORMANCE KEYBOARD MICROCONTROLLER
PDF  19 Pages
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Fabricant  INTEL [Intel Corporation]
Site Internet  http://www.intel.com
Logo INTEL - Intel Corporation

83C51KB Fiches technique(HTML) 18 Page - Intel Corporation

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83C51KB HIGH PERFORMANCE KEYBOARD MICROCONTROLLER
6.5 External Data Memory Read Cycle External Data Memory Write Cycle Waveform
Figure 6. External Data Memory Write Cycle
6.6 Testing Characteristics
Figure 7. Float Waveforms
A4256-01
ALE
PSEN#
TLLAX
TLHLL
TWHQX
PORT 0
P2.0 - P2.7 or A8 - A15 from DPH
PORT 2
A8 - A15 from PCH
A0-A7 from RI or DPL
A0 - A7 from PCL
Data Out
TWHLH
WR#
TQVWH
TAVWL
Instr. In
TQVWX
TAVLL
TLLWL
TRLWH
VLOAD + 0.1 V
VLOAD – 0.1 V
Timing Reference
Points
VLOAD
VOH – 0.1 V
VOL + 0.1 V
For timing purposes, a port pin is no longer floating when a
100 mV change from load voltage occurs and begins to float
when a 100 mV change from the loading VOH/VOL level occurs
with IOL/IOH = ± 20 mA.
A4243-01



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