Autosite_Users_Manual - 第115页
Trans lation Fo rmats AutoSite User Manual B-17 LOF Format, Co de 17 The Link Object Format (LOF) is an extension of the standard JEDEC data translation format and is us ed to transfer fuse and test vector data between t…
Translation Formats
B-16 AutoSite User Manual
Absolute Binary Format, Code 16
Absolute Binary format is a literal representation of the data to be
transferred and no translation of the data takes place during the transfer.
There are no overhead characters added to the data (i.e. no address
record, start code, end code, nulls, or checksum). Every byte transferred
represents the user's data. This format can be used to download
unformatted data such as an “.exe” file to the programmer.
Since this format does not have an end of file character, download
transfers will terminate after no more data are received and an I/O
timeout occurs. This is true for all data formats which don't have an end
of file indicator. For this reason do not use a value of 0 for the I/O
timeout parameter on the communication parameters screen, since this
will disable the timeout from occurring. A value between 1 and 99
(inclusive) should be used for the I/O timeout parameter when using
formats which require the timeout to occur.
Translation Formats
AutoSite User Manual B-17
LOF Format, Code 17
The Link Object Format (LOF) is an extension of the standard JEDEC data
translation format and is used to transfer fuse and test vector data between
the programmer and a host computer. LOF is designed to support the
Quicklogic QL8x12A family of FPGAs. An LOF data file is stored as an
imploded ZIP file, which yields data compression approaching 95%.
Note: The specification for the ZIP data compression algorithm allows for
multiple data files to be compressed into one ZIP file. In addition, the ZIP
data compression algorithm allows for multiple types of data compression.
The programmer's implementation of UNZIP supports only imploded
data files and will extract only the first file in a ZIP file. All remaining
files in the ZIP file will be ignored, as will all files not stored in the
imploded format.
The LOF format contains both a subset and a superset of the JEDEC
format described in this chapter. This section describes only the fields
that are extensions of the JEDEC standard or that are unique to the LOF
format. See the section explaining the JEDEC format for information on
the standard JEDEC fields. See page B-34 for information on obtaining a
copy of the JEDEC Standard 3A.
LOF Field Syntax
The LOF character set consists of all the characters that are permitted with
the JEDEC format: all printable ASCII characters and four control
characters. The four allowable control characters are STX, ETX, CR
(Return), and LF (line feed). Other control characters, such as Esc or Break,
should not be used.
Note: This is Data I/O Corporation's implementation of Quicklogic's Link
Object Format. Contact Quicklogic for a more in-depth explanation of the
format and its syntax.
Translation Formats
B-18 AutoSite User Manual
LOF Fields
The following fields are included in Data I/O’s implementation of the
LOF format:
* These fields are already defined as part of the JEDEC standard and will not be
defined in this section.
<STX> * Start of Data (ASCII Ctrl-B, 0x02 hex)
C * Fuse Checksum
K Fuse data, followed by control words and pulse
link cycles
N * Notes Field
QB Number of bits per word
QC Number of control words at the end of each K
field
QF Number of Fuses in Device (# of K fields)
QM Number of macro cells in the data file
QP * Number of Device Package Pins
QS Number of Hex-ASCII words in each K field
and each control word
QV * Maximum Number of Test Vectors
R Signature Analysis (reserved for future use)
SSpDE Checksum
T Signature Analysis (reserved for future use)
V * Test Vectors (reserved for future use)
X * Default Test Conditions (reserved for future
use)
<ETX> * End of Data (ASCII Ctrl-C, 0x03 hex)