UM2153 datasheet(28/57 Pages) STMICROELECTRONICS

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Hardware layout and configuration

UM2153

28/57

DocID030118 Rev 3

STMicroelectronics recommended device settings are used and the operating

conditions, specified in the STM32L4 datasheets, are respected. The laser output

power must not be increased by any means and no optics should be used with the

intention of focusing the laser beam. Figure 16 shows the warning label for

Class 1 laser products.

•

Easy integration:

–

No additional optics

–

Single power supply

–I2C interface for device control and data transfer: I2C2 from STM32L475VGT6 is

used

–

Xshutdown (Reset) and interrupt GPIO

–

Programmable I2C address

Figure 16. Label for Class 1 laser products

7.13

STSAFE-A 100

The STSAFE-A100 is a highly secure solution that acts as a secure element, providing

authentication and data management services to a local or remote host. It consists of a full

turnkey solution with a secure operating system running on the latest generation of secure

microcontrollers. The STSAFE-A100 can be integrated in IoT (Internet of things) devices,

smart-home, smart-city and industrial applications, consumer electronics devices,

consumables and accessories. The STSAFE-A100 can be mounted on:

•

A device that authenticates to a remote host (IoT device case), the local host being

used as a pass-through to the remote server.

•

A peripheral that authenticates to a local host, for example games, mobile accessories

or consumables.

The STSAFE-A100 is not implemented on the MB1297 Rev C board.

7.14

Buttons and LEDs

The black button B1 located on top side is the reset of the microcontroller

STM32L475VGT6. Refer to the Figure 3: STM32L4 Discovery kit for IoT node (top view).

The blue button B1 located top side is available to be used as a digital input or as alternate

wake-up function.

When the button is depressed the logic state is “0”, otherwise the logic state is “1”.

Two green LEDs (LD1 and LD2), located on the top side are available for the user. To light a

LED a high logic state “1” should be written in the corresponding GPIO.

Table 2 gives the assignment of the control ports to the LED indicators.

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