AN1177 STMicroelectronics, AN1177 Datasheet - Page 7

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

Since Figure 5 is a sample memory map, you may wish to change it. To do so, simply change the chip
select equations within the Design Assistant in PSDsoft Express. For example, if you have a PSD813F
part that doesn’t contain the optional secondary memory, you will want to have the main Flash memory
located in Program Space. See Appendix A for a sample memory map for parts with no secondary boot
memory.
PSDsoft Express Design Entry
Highlights of design entry will be given here. Please refer to the PSDsoft Express User Manual for a thor-
ough coverage of all the features of PSDsoft Express. This section is meant to show you just the essentials
to get you going. Here are the steps:
Invoke PSDsoft Express and Open a New Project.
MCU and PSD Selection. When you click OK in the “New Project” window, the “MCU and PSD Selec-
tion” screen appears. When you see this screen, make the following selections:
This is what the screen should look like after you’ve made the selections:
P51XA interrupt vectors and service routines
I/O management.
Start PSDsoft Express.
Create a new project.
Select your project folder and name the project (in this example, name the project “Easy51XA” in the
folder PSDsoft\my_project).
Select an MCU manufacturer and part number. In this example, we’re using a Philips P51XAG3x.
For the Control Signals box, select /WR, /RD, /PSEN, Burst Mode
Select the PSD8XX series for the PSD Family.
Select a PSD813F2 and use the 52-pin PLCC package (J package).
Based on the above selections, the “Bus Width”, “Bus Mode”, and “ALE/AS Active Level” will be set
automatically.
Set the main Flash memory to “Data Space Only” and the secondary Flash memory to “Program Space
Only”.
AN1177 - APPLICATION NOTE
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