9 STM32G4 Nucleo-64 board information
9.1 Product marking
The sticker located on the top or bottom side of the PCB shows the information about product identification such
as board reference, revision and serial number.
The first identification line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board reference,
“Variant” (optional) identifies the mounting variant when several exist, "y" is the PCB revision and "zz" is the
assembly revision, for example B01.
The second identification line is the board serial number used for traceability.
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore not ready to be used as reference
design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will
be liable for any customer usage of these engineering sample tools as reference designs or in production.
“E” or “ES” marking examples of location:
• On the targeted STM32 that is soldered on the board (For an illustration of STM32 marking, refer to the
STM32 datasheet “Package information” paragraph at the www.st.com website).
• Next to the evaluation tool ordering part number that is stuck or silk-screen printed on the board.
These boards feature a specific STM32 device version, which allows the operation of any bundled commercial
stack/library available. This STM32 device shows a "U" marking option at the end of the standard part number
and is not available for sales.
In order to use the same commercial stack in his application, a developer may need to purchase a part number
specific to this stack/library. The price of those part numbers includes the stack/library royalties.
The board reference for the STM32G4 Nucleo-64 boards is MB1367.
9.2 Board revision history
Revision C-04
The revision C-04 is the initial release.
9.3 Known limitations
9.3.1 Revision C-04
Issue observed
The OPAMP offset value is minimized using a trimming circuitry. At startup, the trimming values are initialized with
the preset factory trimming values. The trimming values of OPAMP1, OPAMP2 and OPAMP4 are not programmed
correctly, resulting in a large offset compared to the one specified.
Proposed workaround
The offset values of OPAMP1, OPAMP2 and OPAMP4 must be calibrated by software, applying the calibration
procedure described in the STM32G4 Series advanced Arm
®
-based 32-bit MCUs reference manual (RM0440), in
the Calibration section of the Operational amplifiers (OPAMP) chapter. Such a procedure is already implemented
in the STM32CubeG4 MCU Package.
Parts impacted
This applies only to the MB1367-based NUCLEO-G474RE boards within the following range of serial numbers:
A191300001-A191304602.
UM2505
STM32G4 Nucleo-64 board information
UM2505 - Rev 3
page 36/43
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