Data I/O UniSite-xpi, User Manual

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6. Translation Formats
6-32 UniSite-xpi User Manual
The Data Bus Width represents the width of the target system’s bus (in
bits). The Data Width Base represents the smallest addressable entity
used by the target microprocessor.
The Data Bus Width and Data Width Base are not used by the
programmer during download. During upload, the Data Bus Width will
be set to the current Data Word Width, and the Data Width Base will be
set to 8. The Transfer Address is not used by the programmer.
Data records follow the Start-of-file record. Each begins with 2 byte
counts: the first expresses the number of 16-bit bytes in the record, not
including the checksum and itself; the second expresses the number of
8-bit data bytes in the record. Next comes a 32-bit address, which
specifies the storage location of the following data byte. Data bytes
follow; after the last data byte is a checksum of every byte in the record
except the first byte, which is the word count.
The End-of-file record consists of a one byte word count, which is always
zero. Leader and trailer nulls, normally 50 each, are suppressed in this
translation format.