Step-by-step execution UM2262
50/94 UM2262 Rev 6
Download the SB SFU project software to the target without starting a debug session
(Security protections managed by SBSFU forbid JTAG connection as it is interpreted as an
external attack).
8.3 Tera Term connection
Tera Term connection is achieved by applying in sequence the steps described from
Section 8.3.1 to Section 8.3.4.
8.3.1 ST-LINK disable
The security mechanisms managed by SBSFU forbid JTAG connection (interpreted as an
external attack). The ST-LINK must be disabled to establish a Tera Term connection. The
following procedure applies from ST-LINK firmware version V2J29 onwards
(a)
:
a) Power cycle the board after flashing SBSFU (unplug/plug the USB cable).
b) The SBSFU application starts and configures the security mechanisms in
development mode. In product mode, security mechanisms are only checked to
be at the correct values.
c) Power cycle the board a second time (unplug/plug the USB cable): the SBSFU
application starts with the configured securities turned on and the Tera Term
connection is possible.
8.3.2 Tera Term launch
The Tera Term launch requires that the port is selected as COMxx: STMicroelectronics
STLink Virtual COM port.
Figure 22 illustrates an example based on the selection of port COM54.
Figure 22. Tera Term connection screen
a. Make sure the ST-LINK debugger/programmer embedded on the board runs the proper firmware version
(V2J29 or higher). If this is not the case, please upgrade this firmware first.
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