AN1356 STMicroelectronics, AN1356 Datasheet - Page 18

• Manufacturer Part Number: AN1356
• Description: PSDSOFT EXPRESS AND PSD4235G2 DESIGN GUIDE
• Manufacturer: STMicroelectronics

AN1356 - APPLICATION NOTE
Figure 22. Design Flow
Additional PSD Settings
Click the ‘Additional PSD Settings’ box. This is where you may choose to set the security bit to prevent a
device programmer from examining or copying the contents of the PSD. You can also click through the
other sheets on this screen to set the JTAG IEEE 1149.1 USERCODE value and set sector protection on
individual PSD non-volatile memory segments as desired.
Fit Design to Silicon
Click the ‘Fit Design to Silicon’ box. PSDsoft Express will input the generated ABEL file and all other
configuration settings to synthesize the logic, creating reduced logic equations and a fusemap that fits the
PSD4235G2 silicon elements. When this process is complete, a report will pop up that shows the resulting
pin assignments and the resulting reduced equations. This is the “fitter report”, which you can use to
document your design.
PSD-Specific C Code Generation
You can take advantage of the provided low-level C code drivers for accessing memory elements within
the PSD by clicking on the ‘Generate C Code Specific to PSD’ box in the design flow window. ANSI C code
functions and headers are generated for you to paste into your C compiler environment. Simply tailor the
code to meet your system needs and compile. C code generation can be performed anytime after a project
is opened.
To generate ANSI C functions and headers, simply specify the folder(s) in which you want the header files
and the C source file to be written, and name the C source file. Select the categories of functions that you
would like to include, then click Generate. Three files will be written to your specified folder(s):
18/49