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Task s and Ki ts ProM aster 25 00 User Manua l 3-15 Selecting a Translation Format Selecting th e translation f ormat requires m atching the data file format on your PC disk with one of the more than 35 formats supported…
Tasks and Kits
3-14 ProMaster 2500 User Manual
•
Serial Vector Test
— The 2500 applies test vectors to the device
inputs in parallel. If the PLD design requires certain input pins to
be applied before others, the JEDEC standard states that the test
vectors must be written to enforce that particular order. When this
option has been selected, the 2500 applies the vector inputs starting
with device pin 1 and continuing in numeric order to the last input.
This option will not harm the device and should be used as a
troubleshooting tool when a large number of devices are passing
fuse verify but failing test vectors. It is not enabled by default.
•
DIP/LCC vector translation
— In some instances the test vectors in
the JEDEC file were written for a DIP device but will be used to verify
a PLCC part. When this translation option is selected, the 2500
automatically translates the DIP test vectors during the download
into the correct format to test the PLCC/LCC part.
Data Sumcheck
This optional parameter, when selected, will check the sumcheck at the
end of the file transfer with the sumcheck entered in this Task field. For
additional information on this parameter, see page 3-18.
Creating a Task for a Memory Device
Creating a Task for a memory device requires that you define the same
mandatory fields used in the logic device Task (see page 3-4). Entering
the parameters for these mandatory fields follows the same procedures
that you used for the logic devices. The following mandatory parameters
must be defined before a Memory Task will run.
• Define one or more
Device(s)
•Select
Data Source
•Select
Data File
and
Translation Format
• Select one or more
Process(es)
•Select
< More... >
and
Handling/Labeling Parameters...
(Package
type, Pin 1 Orientation, Print Density, and Text).
Figure 3-10
Memory Device Task
Tasks and Kits
ProMaster 2500 User Manual 3-15
Selecting a
Translation Format
Selecting the translation format requires matching the data file format on
your PC disk with one of the more than 35 formats supported by the 2500.
Refer to the list of formats on the TaskLink screen by pressing
F2
from the
Translation Format
field on the
Edit Task
dialog box (see Figure 3-10).
Note: Consider high-speed download compatibility when you choose a format.
To identify an unknown format, refer to Appendix D for a description
and example of each data format supported by the 2500.
Other Memory
Parameters
From the Edit Task screen, select
<MORE>
and then
Memory
Parameters...
. TaskLink displays the
Memory Device Parameters
dialog
box with options described in the following sections.
TaskLink supports a variety of Data I/O programmers. Some of the
commands and options displayed on TaskLink’s menus (
Administrator
mode
only) are intended to be used with other products and are not used
in the operating environment of the 2500. Information on these
commands is available by pressing
F1
to invoke TaskLink’s online Help.
Only the commands used with the 2500 are described below.
Word Width
Word width is defined as the word size of the device being programmed.
In most cases this value defaults to the number of data bits at each
address in the device and therefore it is not changed.
Figure 3-11
Memory Parameters Dialog Box
Tasks and Kits
3-16 ProMaster 2500 User Manual
There is one situation when the word width value would be changed.
This occurs if you are trying to program 16-bit RAM data into two 8-bit
memory devices. Assume that the 2500 loads a file intended to program
16-bit data into two 8-bit devices. The low order bytes of each 16-bit word
are saved to all even address in RAM beginning with RAM address 0
(zero). The high order bytes for each word would be stored at RAM
address 1 and all odd address locations. If the default parameters are not
changed, the 2500 would program an 8-bit device (without any errors)
with both odd and even bytes. The device would not operate in a 16-bit
data circuit.
To program all low order bytes into one 8-bit device and all the high
order bytes into the second 8-bit device, the word width should be set as
if it were one “virtual” 16-bit device. The two 8-bit devices will operate in
their target circuit application “virtually” as if they were a single 16-bit
device.
To program a virtual 16-bit device using two 8-bit parts, perform the
following steps:
1. Create two Tasks, one for each 8-bit device that downloads the same
16-bit data file. In the first Task, Set Word Width = 16 (see Figure
3-11), and Set Begin RAM = 0 (default).
2. Create a second Task exactly the same as the first except: Set Begin
RAM = 1.
3. Load the first Task.
4. Program the number of devices required. The combination of these
two parameters instructs the 2500 to program the device from all
even RAM addresses, beginning with address 0. This creates the low
order device in the two-device set.
5. Load the second Task.
6. Program the number of devices equal to the number programmed by
the first Task. The 2500 programs the second device from all odd
RAM addresses, beginning with RAM address 1. This creates the
high order device in the two device set.
Setting I/O Offset
I/O Offset is a value that is subtracted from each file address during a
data file download from the PC to the 2500’s RAM. During a data file
upload from the 2500’s RAM to a PC file, the I/O Offset value is added to
the RAM address before it is transmitted.
The following example uses a file download, because it is the most
common application.
File Download:
File address number
– I/O offset number
----------------------------------
XXXX XXXX
+
Beginning RAM address number
-----------------------------------------------------
2500 RAM address =
YYYY YYYY