Xilinx
Serial PROM Programmer Hardware Updates
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Hardware
Update #1 (8/24/04)
Important
Notice for all Roman-Jones, Inc.
PROM Programmers shipped prior to
August 24, 2004!
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Programmer
Hardware upgrade needed
for Xilinx XC17SxxA family.
There has been a number of reported instances,
when programming the XC17SxxA family parts,
that the part failed margin
verify, but was properly programmed.
The XC17SxxA has a very low power on reset,
POR, threshold of .4 volts. In some instances
on computers that have strong
parallel port input pullups, voltage was
backfeeding through the CEO pin on the PROM
and not allowing the VCC supply pin to drop
below the .4 volt threshold during a power
down sequence. This prevented the margin
verify process from working
correctly. This problem can be easily fixed
with SD101A Schottky barrier
diode and a 10K ohm resistor.
The diode is a small signal type that has
a forward voltage drop of less than .3 volts,
any schottky diode should work. Likewise
the resistance value can vary between 8K
- 12K.
Parts
and Modifications are FREE for all
programmers purchased AFTER August 1, 2003.
There are two options for upgrading your
Roman-Jones, Inc. PROM Programmer:
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Note
NT/2K/XP Users:
New July 21, 2003 release
of NT
Device Driver, Version 4.0
An
updated release, Version 4.0
of the NT/2000/XP Device Driver
is
now available for SPROM32,
Version 4.0
and is necessary for the Xilinx
XC17SxxA
and XC17Vxx parts. Do
not use an old version of
the driver, as part
damage may result.
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Hardware Update #1
is performed on the bottom of the
device:
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Schematic
of SPROM-MPS Version 5 programmer |
1.
Do the upgrade yourself (see instructions
below)
Parts can be purchased
from Roman-Jones, Inc., shipped via mail.
(If programmer purchased before August
1, 2003.)
a)
$5 (United States)
b) $10 (overseas)
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2.
Send the programmer back to Roman-Jones,
Inc.
We will perform the modifications and
test programmer for correct manufacturer
tolerances.We will ship back to you postage
paid. Cost, if programmer purchased before
August 1, 2003.
a) $15 (United States), via UPS ground.
b) $30 (overseas), via US mail.
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Programmer
Upgrade Instructions
There are two modifications needed to be
performed, both involve placing components
on the solder side of the board. Please
reference the photo belowfor component placement
and the schematic link above:
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Add resistor R18, 10K, between pins 1
and 2 of RN4.
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Add Diode D5, SD101A, Schottky diode,
60v, 400mw, DO-35, available from Digi-Key
SD101ADICT-ND, between pins 12 and 17
of P1, the DB25 connector.
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Hardware
Update #2 (5/1/01)
All
Roman-Jones, Inc. PROM Programmers shipped
prior to May 1, 2001, Version 4 and previous.
This modification is built into all Version
5 programmers.
Programmer
Hardware upgrade needed
for new Xilinx XC17SxxA and XC17Vxx parts
The new one time programmable XC17SxxA and
XC17Vxx parts released by Xilinx earlier
this year require a few modifications of
the Roman-Jones, Inc. PROM Programmer for
proper operation. Failure to perform this
upgrade may result in PROM damage and/or
faulty programming. After upgrade, the Roman-Jones,
Inc. PROM Programmer will also be backwards
compatible for the previously supported
Xilinx XC17xx PROM families.
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Parts
and Modifications are FREE for all
programmers purchased AFTER May 1, 2001.
There are two options for upgrading your
Roman-Jones, Inc. PROM Programmer:
1. Do the upgrade yourself (see instructions
below).
Parts can be purchased
from Roman-Jones, Inc., shipped via mail.
(If programmer purchased before May 1,
2001.)
a) $5 (United States)
b) $10 (overseas)
2. Send the programmer back to Roman-Jones,
Inc.
We will perform the modifications and
test programmer for correct manufacturer
tolerances.We will ship back to you postage
paid. Cost, if programmer purchased before
May 1, 2001.
a) $15 (United States), via UPS ground.
b) $30 (overseas), via US mail.
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Programmer
Upgrade Instructions
There are three modifications needed to
be performed.Please reference the photo
for component placement:
-
Resistor R4 is changed to a 3.01K 1%,
¼ watt.(This resistor was 2.87K)
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Resistor R11 is removed and replace with
a wire short. (This resistor was 3.3K)
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Q5 is changed to a Vishay Siliconix VP0300L,
P-channel MOSFET.(This was a PNP 2N4403
transistor.)
Observe polarity and match flat side of
device to silk screen on board.
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Resistor, 1K, added on solder side between
pins 12 and 24 of P1, the 25 pin DB connector.
See solder side figure below. This resistor
was added as R12 in Version 5 of the programmer.
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