SCD1283 INTEL [Intel Corporation], SCD1283 Datasheet - Page 48

• Manufacturer Part Number: SCD1283
• Description: IEEE 1284-Compatible Parallel Interface
• Manufacturer: INTEL [Intel Corporation]

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