User manual

Tasks and Kits
3-8 ProMaster 2500 User Manual
For logic devices, the primary choices are two JEDEC formats (full and
kernel) and Altera POF.
Selecting a Process
The
Process(es)
check box area of the Edit Task dialog box lists the
operations that can be performed on a device. The three columns of check
boxes allow you to configure three different combinations of operations,
or process(es), within the Task.
When at least one operation is selected in more than one column, the
operator running this Task will be presented with a selection box and
asked to choose one of the Processes on the screen.
Highlight the desired operation(s) in each column. Press
S
PACE
to enable
(check) or disable (uncheck) the operations.
The parameter choices are listed below:
•
Blank Check
—This test runs before the device is programmed to see
if the device has any programmed bits (fuses). If programmed bits are
found, the device is rejected and placed in the fail tube. When this test
is not selected as part of the Task process, the 2500 programs and
verifies the device without checking for programmed bits.
•
Illegal Bit
— This test is performed before the device is programmed
to determine whether the device has any illegal bits. An illegal bit is a
bit (fuse) in the device that is programmed when the RAM data for
the same bit specifies that it should be unprogrammed (see Figure
3-5). For all devices except electrically erasable parts, this is an illegal
operation and the device will be routed to the
Fail
output tube. This
test is not performed on an electrically erasable device, because those
devices are completely erased before they are programmed so no
illegal bits can occur.
•
Program
—Select this parameter to program the device as part of the
Task operation. When this is selected, the
Verify
parameter is also
selected. TaskLink does not allow
Program
to be selected without
including the Verify operation.
•
Verify
—Select this parameter to have the 2500 compare the data
programmed in a device to data in RAM. Verify is automatically
selected by TaskLink when Program is selected. Verify may be
selected without selecting Program when you need to check devices
that were programmed earlier.
Figure 3-5
Illegal Bit Condition
1954-1
1111 1101
1011 1111
Device data (erased bit = 1)
RAM data to be programmed into the device
Illegal bit
Not an illegal bit