1.
Enter ATE Mode
: attempts ATE mode procedure.
The GUI:
a.
asserts the SCL pin low (request to enter ATE mode)
b.
switches the internal VCC generation on
c.
checks the ATE mode is effectively working
2.
Auto baud
: is used for internal debug purposes but also to check UART speed. Basically, it performs auto
baud and computes the optimal UART link speed
3.
Go Run Mode
: switches off Internal VCC generation
Once the device has successfully entered ATE mode, the status bar is updated and the ROM ID is displayed
(here 0x04 for STNRG011 Cut4).
Figure 22.
GUI ATE mode status bar
Note:
The GUI prevents accessing ATE mode or forcing VCC when it detects the STNRG011 is running in normal
mode. The main power supply must be switched off before entering ATE mode.
Figure 23.
GUI error when trying to enter ATE mode whilst in normal mode
Once VCC is applied (just after the soft start), the GUI measures the VCC voltage value: if it is below a given
threshold (17 V), the GUI assumes an overconsumption and VCC is automatically disabled.
Figure 24.
GUI error when VCC is applied
9.3
Autobaud
If the device is not able to enter ATE mode, it might be due to UART communication issues.
timing relies on an internal calibrated oscillator, but it does not have the accuracy of an external
crystal.
UM2342
Autobaud
UM2342
-
Rev 1
page 22/57
