3980xpi Users Manual - Data I/O Corporation

Translation Formats
The start-of-file record begins with a tag character and a 12-character file
header. The first four characters are the byte count of the data bytes; the
remaining file header characters are the name of the file and may be any
ASCII characters (in hex notation). Next come interspersed address fields and
data fields (each with tag characters). If any data fields appear before the first
address field in the file, the first of those data fields is assigned to address
0000. Address fields may be expressed for any data byte, but none are
required.
The record ends with a checksum field initiated by the tag character 7 or 8, a
4-character checksum, and the tag character F. The checksum is the two's
complement of the sum of the 8-bit ASCII values of the characters, beginning
with the first tag character and ending with the checksum tag character (7
or 8).
Data records follow the same format as the start-of-file record but do not
contain a file header. The end-of-file record consists of a colon (:) only. The
output translator sends a CTRL-S after the colon.
JEDEC Format, Codes 91 and 92
The JEDEC (Joint Electron Device Engineering Council) format is used to
transfer fuse and test vector data between the programmer and a host
computer. Code 91 is full format, and includes all the data fields (such as note
and test fields) described on the following pages. Code 92 is the Kernel, or
shorter, format. The JEDEC Kernel format includes only the minimum
information needed for the programming; it does not, for example, include
information fields or test vector fields. Prior to transferring a JEDEC file, the
appropriate Logic device must be selected.
JEDEC's legal character set consists of all the 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 JEDEC
Standard 3A. For a copy of the strict standard, write to:
Electronic Industries Association
Engineering Department
2001 Eye Street NW
Washington, D.C. 20006
3980xpi/3980/3900/2900 User Manual 5-27