Usb Fs; Operating Voltage; Smbus Temperature Sensor; Table 6. Boot Related Jumper - ST STM32L073Z-EVAL User Manual

UM1878
Jumper
jumper not
fitted (default
JP3
setting)
Jumper fitted
7.7

USB FS

STM32L073Z-EVAL evaluation board supports USB2.0 FS communication. The USB
connector is the micro-B type connector CN9.
The USB functionality is independent of LCD glass connectors.
STM32L073VZT6 ports PA11 and PA12 are used for the USB DM and DP signals
respectively. In case PA11 and PA12 are not used for USB, it can be accessed for another
usage by the extension connector CN4, providing resistors R69 and R70 are removed.
USB section of the micro-controller STM32L073VZT6 V
3.6 V internally or externally through jumper JP7. Refer to
more details regarding JP7 use.
7.7.1

Operating voltage

•
If V
DD_USB
and 2 should be connected, please refer to
•
If V
DD_USB
the voltage range: 1.65 V to 3.6 V.
7.8

SMBus temperature sensor

A temperature sensor STLM75M2F is connected to I2C1 bus and to the SMBus of the
microcontroller STM32L073VZT6.
2
The I C address of temperature sensor is by default 0x92 with address pin A0 set to 1 by
the closed solder bridge SB4.
By opening SB4 it is possible to change the temperature sensor address into 0x90.

Table 6. Boot related jumper

By default, BOOT0 is only controlled by switch SW1.
BOOT0 can be forced high with terminal 6 of CN6 connector (RS-232 DSR
line). This configuration is used to allow the device connected via RS-232 to
initiate STM32L073VZT6 flashing process.
is supplied from V : USB is working typically with V
DD
is supplied from USB (U5V voltage), STM32L073Z-EVAL is functional in all
UM1878 Rev 2
Hardware layout and configuration
Description
must be supplied with 3.0 to
DD_USB
Section 7.3: Power supply
DD
Section 7.3: Power supply
for
> 3.0 V. JP7 pins 1
for more details.
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