2500_Users_Manual - 第87页

Task s and Ki ts 3-12 ProMa ster 25 00 U ser Ma nual The Placement parameter ( Label placement ) controls the location of the label on the device. TaskLink’s default is Autocenter (numeric value of 255 in th is field) , …

Tasks and Kits

ProMaster 2500 User Manual 3-11

Entering Label Text

Enter

Text

to appear on the label. The TaskLink screen may allow you to

enter more characters than will fit on the label you are using. The number

of characters per line varies, but labels are restricted to three printed lines

regardless of the label size or font selected.

TaskLink includes a set of unique character commands that you can use

to have TaskLink to print non-standard characters on your label. When

you enter the predefined sequence of characters in the text field on your

screen, TaskLink prints the special character they represent on the label.

These include:

• A time and date stamp is printed when you enter the

sign along

with an optional parameter (refer to the online help for a list of the

options).

• A copyright symbol is printed when a tilde (

) is entered.

• A serial number is printed when two or more

signs are entered.

• The sumcheck of RAM is printed when you enter at least two dollar

signs (

)

• The session ID is printed when two to eighteen carets (

) are entered.

The

Print Density

field allows you to select the font type in characters per

inch (CPI) that the labeler will use when printing your label. The 2500

defaults to

Auto Select

, which instructs the 2500 to select the optimal

character size based on the Package parameter and the amount of text

entered.

You may use the

Print Only

command in local mode to select the best

font for your label size and text length.

Figure 3-8

Recommended Device Orientation in Input Device

1854-3

NOTCHED

CORNER

INPUT TUBE

HOLDER

INPUT TUBE

HOLDER

TUBE INSERTED

WITH DEVICE

CONTACTS

FACING UP

TUBE INSERTED

WITH DEVICE

CONTACTS

FACING UP

SQUARE

PLCC

DEVICES

DIP/SOIC

DEVICES

PIN 1

Tasks and Kits

3-12 ProMaster 2500 User Manual

The

Placement

parameter (

Label placement

) controls the location of the

label on the device. TaskLink’s default is

Autocenter

(numeric value of

255 in this field), which instructs the 2500 to position the label in the center

of the device package. A placement value of 0 (zero) places the left end on

the label on the left end of the device’s leading edge. Increasing the

placement value by one moves the label 0.010 inch away from the leading

edge of the device.

Press

to move the screen cursor over the

<OK>

pushbutton. Press

↵

to save the changes made in this dialog box. TaskLink returns to the

Edit

Task

screen.

This is the last mandatory field definition. While there may be several

other parameters that you will always change from the default setting,

the Task now has the minimum number of fields it needs to run and

process devices. It is important that you save these settings before leaving

the Task-creating portion of TaskLink.

Saving the Task

Press

to move the screen cursor to the

<Save>

and press

↵

. TaskLink

returns to the Add Task dialog box. The new Task name and description

appear in the Task list and the cursor is in the Task Name entry field,

ready to create the next Task.

The process of creating a basic Task for a Logic device is complete when

parameters for all the mandatory fields have been entered. The Task will

run and program devices. Other non-mandatory logic parameters that

can further define the Task are described in the next section.

Other Logic

Parameters

To select other logic parameters from the

Edit Task

screen, select

<MORE...>

and then

Logic Parameters...

Figure 3-9

Logic Device Parameters

Tasks and Kits

ProMaster 2500 User Manual 3-13

TaskLink displays the Logic Device Parameters dialog box with these

main options:

•

Verify Options

— Select one option from the three offered.

•

Fuse verify only

— Compares the fuses programmed in the logic

device with the pattern in the 2500’s RAM. No structured test

vectors are applied to the device even if they were downloaded in

the JEDEC data file.

•

Functional test only

— Verifies the programmed device using the

structured test vectors downloaded with the JEDEC data file. The

fuses in the device are not checked. This is useful when the devices

have had their security fuse programmed so that the fuse pattern in

their main array can no longer be read by the programmer. Vectors

written for the device will confirm that the device is functioning

correctly if all vectors pass.

•

Fuse verify

and

functional test

(default)—Verifies the

programmed device by comparing the device fuses against the

fuses in RAM. If the device passes, the test vectors are applied to

the device. If all the fuses verify and the vectors pass, the device is

labeled and placed in the pass output tube.

•

Vector Options

—

Select any combination of these three options to

change the way logic test vectors are applied to your device during

the verify cycle. These test vector options may improve the yield of

devices that pass fuse verify but fail test vectors. Certain PLD Tasks

may experience a higher failure rate when test vectors are run. These

failures are usually a combination of conditions in the design (as

defined in the JEDEC file), the internal characteristics of the device,

and the way the 2500 applies vectors. These test vector options affect

the way the 2500 applies the file’s test vectors to the device in an

attempt to improve the number of devices that pass test vectors.

•

Compensated Vectors

— Some PLD designs create combinatorial

latches on registered outputs and may fail test vectors even though

the devices have been programmed correctly. This is most often

due to a combination of factors including the specific PLD design,

the device’s internal hardware characteristics, and the

programming electronics in the 2500. If this parameter has been

disabled and a large number of combinatorial output devices are

failing test vectors, selecting Compensated Vectors may improve

the yield. This parameter is enabled by default in TaskLink.

•

High-speed Drivers

— Some PLD designs, when implemented in

certain high-speed PLDs, will fail test vectors even though the

device programmed correctly and functions correctly in-circuit.

The High-speed Drivers option (which is enabled by default)

applies the vector inputs to the device at a higher speed, using a

higher current drive.

Note: Because this option is enabled by default, be careful how you write your

drivers. If the JEDEC file test vectors have not been written correctly, this

higher current applied to a bi-directional input pin might damage some

devices.