UM1724 Rev 14 11/68
UM1724 Quick start
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the year and WW is the week. For example, a part manufactured in week 23 of 2015 bares 
the date code 5
 23.
The bootloader ID of the bootloader V 9.0 is 0x90.
The following limitations exist in the bootloader V 9.0:
1. RAM data get corrupted when written via USART/SPI/I
2
C/USB interface
Description:
Data write operation into RAM space via USART, SPI, I
2
C bus, or USB results in wrong or 
no data written.
Workaround:
To correct the issue of the wrong write into RAM, download STSW-STM32158 bootloader 
V
 9.0 patch package from the www.st.com website and load ‘Bootloader V9.0 SRAM patch’ 
to the STM32, following the information in readme.txt file available in the package.
 
2.  User Flash memory data get corrupted when written via CAN interface
Description:
Data write operation into user Flash memory space via CAN interface results in wrong or no 
data written.
Workaround:
To correct the issue of the wrong write into Flash memory, download the STSW-STM32158 
bootloader V
 0.9 patch package from the www.st.com website and load ‘Bootloader V9.0 
CAN patch’ to the STM32, following the information in readme.txt file available in the 
package.
5.3 Hardware configuration variants
The board can be delivered with different configurations of the oscillator of the target 
STM32. For all the details concerning high-speed configurations of the oscillator refer to 
Section 6.7.1. For all the details concerning low-speed configurations of the oscillator refer 
to Section 6.7.2.