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For the STM32L5 series the security features of the Arm Cortex-M33 processor and its Arm® TrustZone® for Armv8-M are combined with ST security implementation. Selecting an STM32L5 MCU or board requires to choose whether to activate Arm® TrustZone® (hardware security) or not (see Figure 25). The project is adjusted accordingly:

if Arm® TrustZone® is not activated, the solution is the same as for other STM32Lx series

if Arm® TrustZone® is activated, the project configuration and the generated project shows specificities related to the security features (refer to dedicated sections in this manual).

Figure 25. Enabling Arm® TrustZone® for STM32L5 series

The selectors result view can be adjusted (see Figure 26):

Left click the column to sort

Right click to add/remove columns.

Figure 26. Adjusting selector results

4.2.1MCU selector

MCU selection

The MCU selector enables filtering on a combination of criteria: series, lines, packages, peripherals, or additional characteristics such as price, memory size or number of I/Os (see Figure 27), and on their graphics capabilities as well.

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Figure 27. New Project window - MCU selector

Export to Excel feature

By clicking on the

icon, the user can save the MCU table information to an

Excel file.

 

Show favorite MCUs feature

Clicking the

icon for an MCU from the list marks it as favorite, see Figure 28.

 

Figure 28. Marking a favorite

 

 

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MCU close selector feature

When the number of MCUs found is lower than 50, the selector offers to list the MCUs with close features (see Figure 29). Clicking the Display similar items button displays them (see Figure 30): by default, MCUs are sorted first by matching ratio, then by part number. For close MCUs (those with a matching ratio lower than 100%) rows are shown in gray, and non matching cells are highlighted in dark gray.

Figure 29. New Project window - MCU list with close function

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Figure 30. New Project window - List showing close MCUs

Note:

A matching percentage is computed for each user selected criteria, for example:

 

- When requesting four instances of the CAN peripheral, MCUs with only three instances

 

reach a 75% match on the CAN criteria

 

- If the maximum price criteria is selected, the matching ratio for a given MCU is the

 

maximum requested price divided by the actual MCU price. In the case of a minimum price

 

criteria, the matching ratio is the MCU price divided by the minimum requested price.

 

Finally, all criteria ratios are averaged to give the Match column percentage value.

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