Limitations; Operating Voltage; Microsd Card; Analog Input Adc - ST STM32L073Z-EVAL User Manual

Hardware layout and configuration
By default, the serial communication settings are: 115200b/s, 8bits, no parity, 1 stop bit, no
flow control.
7.11.1

Limitations

No limitation.
7.11.2

Operating voltage

The Virtual Com Port is operating over the whole V
7.12

MicroSD card

A 4-Gbyte microSD card can be plugged into the connector CN13, located at the left side of
the board. It communicates with the microcontroller STM32L073VZT6 using the SPI1 port.
The card detection switch is connected to the GPIO expander MFX, part U25.
Level shifters insure functionality of microSD card over the whole voltage range.
Pin
number
1
2
3
4
5
7.12.1 Limitations
With V
DD
If V < 2.7 V the SPI clock should be 8 MHz maximum.
DD
7.12.2 Operating voltage
STM32L073Z-EVAL evaluation board Micro SD card is operating over whole range of V
1.65 V to 3.6 V.
7.13

Analog input ADC

The analog input ADC_IN5 (port PA5) of the microcontroller STM32L073VZT6 is available
at connector CN2. It is located below right to the touch sensing slider LS1. The 2-pin
connector CN2 allows connection of a GND reference to the left pin of CN2, and the voltage
to be converted is connected to the right pin of CN2.
22/64

Table 9. MicroSD connector CN13

Description
NC
MicroSD_CS (PD0)
SPI_MOSI (PE15)
+3V3
SPI_CLK (PE13)
> 2.7 V the SPI clock can be at maximum speed: 16 MHz.
DD
Pin
number
6
7
8
9
10
UM1878 Rev 2
range: 1.65 V to 3.6 V.
Description
GND
SPI_MISO (PE14)
NC
GND
MicroSDcard_detect (to expander
MFX)
UM1878
:
DD