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SCD1283 Fiches technique(PDF) 48 Page - Intel Corporation

No de pièce SCD1283
Description  IEEE 1284-Compatible Parallel Interface
PDF  94 Pages
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Fabricant  INTEL [Intel Corporation]
Site Internet  http://www.intel.com
Logo INTEL - Intel Corporation

SCD1283 Fiches technique(HTML) 48 Page - Intel Corporation

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CD1283 — IEEE 1284-Compatible Parallel Interface
48
Datasheet
useful in slow systems that cannot guarantee that the CPU can check the register after it is
cleared or before it is loaded with the revision code.
This procedure is also used as part of a diagnostic test suite. The device completes internal
initialization within 500
µsec. A timer (software or hardware) detects when the operation is not
completed within that time and cues if the device is functional.
Figure 15. Flow Diagram of the CD1283 Master Initialization Sequence
GFRCR
= 0
?
ISSUE RESET
COMMAND
N
Y
GFRCR
= 25*
?
N
Y
CONTINUE
INIT PROCESS
* REVISION CODE FOR
REVISION E DEVICE = 25
FUTURE REVISIONS, IF
RCR
= 0
?
N
Y
THIS BY ONE; FOR EXAMPLE,
REVISION F WOULD BE 26, ETC.
NECESSARY, WILL INCREMENT
CLEAR
GFRCR



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