
ST72321xx-Auto Device configuration and ordering information
Doc ID 13829 Rev 1 227/243
21.2 ROM device ordering information and transfer of customer
code
Customer code is made up of the ROM/FASTROM contents and the list of the selected
options (if any). The ROM/FASTROM contents are to be sent on diskette, or by electronic
means, with the S19 hexadecimal file generated by the development tool. All unused bytes
must be set to FFh.
Complete the appended Option list on page 230 to communicate the selected options to
STMicroelectronics and check for regular updates of the option list on the ST website or ask
your ST representative.
Refer to application note AN1635 for information on the counter listing returned by ST after
code has been transferred.
The following Figure 106 and Figure 107 serve as guides for ordering. The
STMicroelectronics Sales Organization will be pleased to provide detailed information on
contractual points.
Caution: The Readout Protection binary value is inverted between ROM and Flash products. The
option byte checksum will differ between ROM and Flash.
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