AN1177 STMicroelectronics, AN1177 Datasheet - Page 16

• Manufacturer Part Number: AN1177
• Description: P51XA-PSD8XX DESIGN GUIDE
• Manufacturer: STMicroelectronics

AN1177 - APPLICATION NOTE
equations to implement memory swapping (as shown in the next subsection). This bit can be modified at
runtime by writing to its location in the Page Register within the CSIOP address space. See the PSD8XX
Family Data Sheet for details. When you have made the addition, your screen should look like this:
Modify the Chip Select Equations. The chip selects equations need to be modified (from what they
were in Section 3.2.5) to match the situational memory maps outlined in Figure 6 to Figure 9 in Section
4.2. That is, the memory map that is presented to the MCU will vary dynamically based on the settings of
the VM Register and pgr7 (“swap”) of the Page Register. In order to make the memory maps of Section
4.2 work, csboot0, csboot1, and fs7 need to be modified. Below, the modified csboot0 is shown as an ex-
ample.
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