After ST factory calibration (trimming), the resulting accuracy is about 2.3%; enough to ensure normal UART
communication.
However, if the accuracy is outside UART tolerances, the GUI might not be able to communicate with STNRG011
and ATE mode would fail.
To avoid this failure, the GUI has an
Autobaud
function which tries to communicate with the STNRG011 chip at
various speeds.
So, if the ATE mode sequence fails, select the Autobaud feature.
If the GUI is able to communicate with the chip, it displays the resulting UART speed and applies it for the ATE
mode.
Figure 25.
Autobaud menu and results
Note:
The computed speed is not updated in the Application Settings menu.
9.4
NVM options
In the ATE mode, NVM operations are accessible via the
Tools
menu.
Figure 26.
NVM operations menu
All power supply customization parameters are stored in the
on-chip
NVM memory.
You can read/write the NVM by :
1.
Using the
NVM r&w
tab, mainly to write the complete NVM without knowing the parameters
2.
Using the
NVM editor
, to edit specific parameters
9.5
NVM editor
The NVM editor provides an intuitive way of changing the
system parameters, which are about 80.
Those parameters are stored in the 32-byte NVM on-chip memory.
The GUI maps the NVM parameters to the 32-byte memory.
UM2342
NVM options
UM2342
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Rev 1
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