Figure 8.
Power tree
USB_ST_LINK
USB_UART
USB_DEVICE
USB_PWR
Battery
3.3 V LDO
ST1L05BPUR
3.6 V LDO
ST1L05BPUR
1.8 V LDO
ST1L05BPUR
0.96-inch
OLED
ST-LINK/V2-1
3.3 V LDO
LD3985M33R
LBAD0ZZ1SE
Quad-SPI
Flash
Audio codec
LSM303AGR
LPS22HH
HTS221
VDDIO_MDM
VDDIO
VDDIO
SIM card
VDD_SIM
USB to UART
I/O level-
translation
EEPROM
1.8 V
1V8_MD
SB34
SB33
UM2743
Power supply
UM2743
-
Rev 1
page 15/58