Hardware layout and configuration
UM1521
10/56
Doc ID 022868 Rev 1
Note:
Due to some peripheral component specifications, the low voltage limitations (component
will not work correctly when power level is under low voltage limitation) related to the
operating voltage of the peripherals are shown in
.
Note:
The recommended AC220 V to DC5 V power adapter is the PSU-5V2A. It is not included
with the board but can be ordered from ST as a separate item. You can also use another
equivalent 5 V power adapter (polarity compatible with CN2) to power the STM32L152D-
EVAL board via the CN2 power jack on the board.
To order the recommended power supply, use the order code PSU-5V2A.
JP5
VDD is connected to fixed +3.3 V DC power when JP5 is set as shown to
the right: (
Default setting
)
VDD is connected to adjustable DC power from 1.65 V to 3.6 V when
JP5 is set as shown to the right:
JP10
VDD power is directly connected to MCU VDD when JP10 is set as
shown to the right (
Default setting
):
Note: For manual I
DD
measurement the jumper on JP10 must be
removed and replaced by an ampermeter connected between pin 1 and
2 of JP10.
Connect VDD power to MCU with current-sampling resister, 1 Ohm or
1 KOhm, in series for I
DD
current measurement when JP10 is set as
shown to the right:
Table 2.
Power supply jumper settings (continued)
Jumper
Description
Setting
Table 3.
Low voltage limitation
Peripheral
Component
I/O name
Low voltage limitation
USB
CN15
USB
3 V
MicroSD Card
CN3
SDIO
2.7 V
SRAM
U5
FSMC
2.4 V
EEPROM
U25
SPI
1.8 V
RF EEPROM
CN12
I2C
1.8 V
www.BDTIC.com/ST
