10
E²P operations
Important:
shares the E²P interface (SDA/SCL) with the UART interface to minimize pin count. During normal operation
(switching), the optional E²P is only accessed at boot and when a fault occurs.
It is possible to access E²P in normal mode, but this might cause conflicts due to simultaneous access by the
STNRG011 metering information (UART) and the GUI accessing the E²P.
Figure 29.
E²P simultaneous access conflicts on UART/I²C link
As a consequence, STNRG011 metering messages must be disabled, but this is only possible if UART uplink
communication is enabled. Otherwise, E²P must be accessed while STNRG is disabled (e.g. no mains or external
VCC required thanks to the internal VCC generation in ATE mode).
E²P operations are accessible via the
Tools
menu.
Figure 30.
E²P operation menu
10.1
E²P dump
This feature allows displaying the content of the external E²P and is mainly used for debugging.
It is also possible to change a memory value by either clicking the address to be changed or by pressing the
Write
button in the
Address
and
Value
boxes.
UM2342
E²P operations
UM2342
-
Rev 1
page 26/57
