10

Device setup and User personalization

It is possible to set up device parameters to configure ST-ONEMP behavior. A dedicated GUI and a HW tool

are available to change and tune the application behavior during development time. The ST-ONEMP devices are

shipped with a pre-defined set-up, but the user can change it using the serial line.

The entire device setup is always modifiable using a dedicated tool. In case the write protection is enabled on

the device, the user can only delete this memory area. The devices set-up area is divided into different zones,

application set-up area, application parameter area, USB-PD area and power area.

The data area is protected by CRC32 reverse polynomial (ISO 3309 - 0xedb88320).

Please check the ST-ONEMP Parameter Configuration Manual document which specifies any detail regarding the

User personalization.

The same tools can be used also to update the entire program file area with a new firmware version or a

dedicated firmware. The program file area is protected by CRC32 reverse polynomial.

10.1

Application set-up area

This area stores all the values used to configure the application. This area is read by the Boot code during

startup.

10.2

Application parameters area

The Application parameters area contains the secondary overtemperature protection levels (SOTP). The SOTP

levels are divided into two zones, internal on ST-ONEMP and external.

•

The internal temperature is provided by an internal sensor: the user defines the internal temperature trigger

point.

•

The external temperature requires a thermistor connected to a GPIO pin that is specified in the Application

set-up field. The user provides the voltage levels at which SOTP is triggered, and the direction (rising

or falling) depending on the external circuit used. External sense circuit is optional, if not connected this

function is not available.

The programmability of the ST-ONEMP device also provides a warning temperature limit.

10.3

USB-PD area

The USB-PD area defines which PDOs and APDOs are provided by the USB-PD protocol.

This area contains also the maximum power provided by the ST-ONEMP application. The maximum power value

is shared with the SINK during USB-PD messages.

10.4

Power area

The power parameters area stores the parameters required for the switching control, including loop compensation

parameters, low power mode settings, etc.

10.5

Default configuration

The default configuration allows the user to set up and define all the parameters .

The default configuration selects the CC1 and CC2 pins as the serial line used to communicate, configure and

program the IC through a serial interface. Please visit the product page on www.st.com to find the dedicated HW

programmer and software.

ST-ONEMP

Device setup and User personalization

DS13989 - Rev 2

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