3980xpi Users Manual - Data I/O Corporation

Optional Parameters
Commands
The Non-default Parameters screen, which contains the preceding
parameters and any default parameters that were changed, is displayed as the
default. The more complex All Parameters screen displays the following
additional parameters. To toggle between the two screens, press F4.
� Illegal Bit Check (Y,N)
Enables (default) or disables the Illegal Bit test, which compares data in a
device against data in programmer RAM to determine if the device has
already-programmed locations of incorrect polarity.
For example, the programmer would return an illegal-bit error if data in
RAM indicates that a specific bit should be in an unprogrammed state but
the corresponding bit in the device is in a programmed state.
The device cannot be programmed if the programmer detects an illegal bit.
� Blank Check (Y,N)
Enables (default) or disables the Blank Check test, which checks a device
for programmed bits.
� Enable Yield Tally (Y,N)
When enabled, directs the programmer to keep a running tally of the
programming yields for the last sixteen types of devices programmed.
These totals show how many devices passed and failed, and what specific
errors, if any, have occurred. The defaults is N. See “Yield Tally” on
page 4-69 for more information.
� Logic Verification (A,F,V)
Specifies the type of logic verification to be performed after programming.
Press SPACE to step through the following three choices:
All (A)—Performs both fuse and vector verification. This is the default.
Fuse Verification (F)—Checks the fuse pattern programmed into the
device with the pattern in the programmer's memory.
Vector Verification (V)—Tests the device using structured test vectors
stored in memory. The programmer does not support vector testing for
logic devices with more than 84 pins.
The programmer does not support vector testing for logic devices with
more than 44 pins.—2900
� Verify Passes (0,1,2)
Selects the number of times to test the device.
0—Do not to test the device.
1—Test the device once at the device manufacturer's nominal Vcc.
2—Verify the device at the device manufacturer's recommended high and
low Vcc levels. This is the default.
� Reject Option (C,S)
Selects the number of times the device is pulsed with programming voltage
before it is rejected as unprogrammable.
C—Selects the number of pulses specified by the manufacturer (the
default). Unless you are programming devices to a strict military
specification, leave this option set to C.
S—Selects either one-pulse or military-specification number of pulses.
3980xpi/3980/3900/2900 User Manual 4-11