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<title>Release Notes for STM32WBxx CMSIS</title>
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<h1 id="release-notes-for-stm32wbxx-cmsis"><small>Release Notes for</small> STM32WBxx CMSIS</h1>
<p>Copyright © 2019 STMicroelectronics<br />
</p>
<a href="https://www.st.com" class="logo"><img src="_htmresc/st_logo.png" alt="ST logo" /></a>
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<h1 id="license">License</h1>
<p>This software component is licensed by ST under BSD 3-Clause license, the “License”; You may not use this component except in compliance with the License. You may obtain a copy of the License at:</p>
<p><a href="https://opensource.org/licenses/BSD-3-Clause">https://opensource.org/licenses/BSD-3-Clause</a></p>
<h1 id="purpose">Purpose</h1>
<p>This driver provides the CMSIS device for the stm32wbxx products. This covers</p>
<ul>
<li>STM32WB55xx devices</li>
<li>STM32WB5Mxx devices</li>
<li>STM32WB50xx devices</li>
<li>STM32WB35xx devices</li>
<li>STM32WB30xx devices</li>
</ul>
<p>This driver is composed of the descriptions of the registers under “Include” directory.</p>
<p>Various template file are provided to easily build an application. They can be adapted to fit applications requirements.</p>
<ul>
<li>Templates/system_stm32wbxx.c contains the initialization code referred as SystemInit.</li>
<li>Startup files are provided as example for IAR©, KEIL© and SW4STM32©.</li>
<li>Linker files are provided as example for IAR©, KEIL© and SW4STM32©.</li>
</ul>
<h1 id="specific-consideration-for-available-flash-size-inside-linker-file">Specific consideration for available FLASH size inside linker file</h1>
<p>The available flash size depends on the wireless binary used inside the STM32WB device.</p>
<p>The linker files templates for IAR, KEIL and GCC provide example of implementation which can be tuned.</p>
<p>You can refer to the below chapters to optimize the usage of the flash on your device.</p>
<h2 id="stm32wb55xx-stm32wb50xx-and-stm32wb5m">STM32WB55xx, STM32WB50xx and STM32WB5M</h2>
<p>The default linker file provided in “/Drivers/CMSIS/DeviceST/STM32WBxx/Source/Templates” allows the application to use 512KB of flash.</p>
<p>The maximum flash memory that can be used by the application is up to the Secure Flash Start Address (SFSA) that can be read from the option byte.</p>
<p>The __ICFEDIT_region_ROM_end__ in the linker can be modified with a value up to : (0x08000000 + (SFSA &lt;&lt; 12)) - 1.</p>
<p>Example:</p>
<ul>
<li>When the SFSA option byte is set to 0xA0, the maximum value to be used for __ICFEDIT_region_ROM_end is 0x0809FFFF which is 640KB of flash.</li>
</ul>
<p>Note:</p>
<ul>
<li>The SFSA option byte can only be set by the CPU2. The user cannot modify that value.</li>
</ul>
<h2 id="stm32wb35xx-and-stm32wb30xx">STM32WB35xx and STM32WB30xx</h2>
<p>The default linker file provided in "/Drivers/CMSIS/Device/ST/STM32WBxx/Source/Templates allows the application to use 120KB of flash.</p>
<p>The maximum flash memory that can be used by the application is up to the Secure Flash Start Address (SFSA) that can be read from the option byte.</p>
<p>The __ICFEDIT_region_ROM_end__ in the linker can be modified with a value up to : (0x08000000 + (SFSA &lt;&lt; 12)) - 1.</p>
<p>Example:</p>
<ul>
<li>When the SFSA option byte is set to 0x32, the maximum value to be used for __ICFEDIT_region_ROM_end is 0x08031FFF – which is 200KB of flash</li>
</ul>
<p>Note:</p>
<ul>
<li>The SFSA option byte can only be set by the CPU2. The user cannot modify that value.</li>
</ul>
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<h1 id="update-history">Update History</h1>
<div class="collapse">
<input type="checkbox" id="collapse-section5" checked aria-hidden="true"> <label for="collapse-section5" aria-hidden="true">v1.4.0 / 12-February-2020</label>
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<h2 id="main-changes">Main Changes</h2>
<h3 id="introduction-of-stm32wb35xx-stm32wb30xx-and-stm32wb5mxx-product">Introduction of STM32WB35xx, STM32WB30xx and STM32WB5Mxx product</h3>
<p>This release introduce the support of STM32WB5Mxx, STM32WB35xx product and its value line STM32WB30xx.</p>
<p>Added features:</p>
<ul>
<li>Templates/system_stm32wbxx.c contains the initialization code referred as SystemInit.</li>
<li>Startup files are provided as example for IAR©, KEIL© and SW4STM32©.</li>
<li>Linker files are provided as example for IAR©, KEIL© and SW4STM32©.</li>
<li>The product STM32WB5Mxx is supported by enabling inside your project the define “STM32WB5Mxx”.</li>
<li>The product STM32WB35xx is supported by enabling inside your project the define “STM32WB35xx”.</li>
<li>The product STM32WB30xx is supported by enabling inside your project the define “STM32WB30xx”.</li>
</ul>
<h2 id="development-toolchains-and-compilers">Development Toolchains and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V8.20.2</li>
<li>RealView Microcontroller Development Kit (MDK-ARM) toolchain V5.25</li>
<li>System Workbench STM32 (SW4STM32) toolchain V2.7</li>
</ul>
<h2 id="supported-devices-and-boards">Supported Devices and boards</h2>
<ul>
<li>STM32WB55xx, STM32WB5Mxx, STM32WB50xx, STM32WB35xx and STM32WB30xx devices.</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section4" aria-hidden="true"> <label for="collapse-section4" aria-hidden="true">v1.3.0 / 11-September-2019</label>
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<h2 id="main-changes-1">Main Changes</h2>
<p>Maintenance release for <strong>STM32WBxx</strong> devices (stm32wb55xx and stm32wb50xx devices)</p>
<table>
<thead>
<tr class="header">
<th style="text-align: left;">Fixed bugs headline</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td style="text-align: left;">Remove IS_TIM_SYNCHRO_INSTANCE macro from CMSIS</td>
</tr>
<tr class="even">
<td style="text-align: left;">Move FLASH_SIZE define from hal flash. h to cmsis device file</td>
</tr>
<tr class="odd">
<td style="text-align: left;">Correct size of .bin files generated by SW4STM32</td>
</tr>
<tr class="even">
<td style="text-align: left;">Remove RCC_PLLSAI_SUPPORT for STM32WB50</td>
</tr>
</tbody>
</table>
<h2 id="development-toolchains-and-compilers-1">Development Toolchains and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V8.20.2</li>
<li>RealView Microcontroller Development Kit (MDK-ARM) toolchain V5.25</li>
<li>System Workbench STM32 (SW4STM32) toolchain V2.7</li>
</ul>
<h2 id="supported-devices-and-boards-1">Supported Devices and boards</h2>
<ul>
<li>STM32WB55xx, STM32WB50xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section3" aria-hidden="true"> <label for="collapse-section3" aria-hidden="true">V1.2.0 / 26-June-2019</label>
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<h2 id="main-changes-2">Main Changes</h2>
<h3 id="introduction-of-stm32wb50xx-device">Introduction of STM32WB50xx device</h3>
<p>First release for STM32WBxx CMSIS introducing <strong>stm32wb50xx</strong> devices.</p>
<h2 id="contents">Contents</h2>
<p>CMSIS devices files for stm32wb55xx, stm32wb50xx devices.</p>
<h2 id="development-toolchains-and-compilers-2">Development Toolchains and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V8.20.2</li>
<li>RealView Microcontroller Development Kit (MDK-ARM) toolchain V5.25</li>
<li>System Workbench STM32 (SW4STM32) toolchain V2.7</li>
</ul>
<h2 id="supported-devices-and-boards-2">Supported Devices and boards</h2>
<ul>
<li>STM32WB55xx and STM32WB50xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section2" aria-hidden="true"> <label for="collapse-section2" aria-hidden="true">V1.1.0 / 05-April-2019</label>
<div>
<h2 id="main-changes-3">Main Changes</h2>
<h3 id="maintenance-release">Maintenance release</h3>
<p>Maintenance release for <strong>STM32WBxx</strong> devices (stm32wb55xx devices)</p>
<table>
<caption>Fixed bugs list</caption>
<thead>
<tr class="header">
<th>Headline</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td>Correct GCC linker file: Set available size of RAM1 to 192K - 4 instead of 191K.</td>
</tr>
<tr class="even">
<td>Set FLASH_ACR_LATENCY_x as uint32_t (UL instead of U).</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section1" aria-hidden="true"> <label for="collapse-section1" aria-hidden="true">V1.0.0 / 06-February-2019</label>
<div>
<h2 id="main-changes-4">Main Changes</h2>
<h3 id="first-release">First release</h3>
<p>Add support of STM32WB55xx.</p>
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<p>For complete documentation on STM32WBxx, visit: [<a href="http://www.st.com/stm32wb">www.st.com/stm32wb</a>]</p>
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