ST STM3210C-EVAL User Manual page 8

Hardware layout and configuration
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Warning: When the board is connected to an USB host via CN2 and
powered by an external power supply (JP25 is in position
PSU) it is mandatory to remove the USB cable when the
external power supply is OFF, else an unexpected current is
provided by USB VBUS which maintains a residual voltage on
the board.
Table 2. MCU power consumption measurement related jumpers
Jumper
PC13 is connected to anti-tamper button when JP1 is set as shown:
(Default)
JP1
PC13 is connected to MCU consumption measurement circuit as
IDD_CNT_EN signal when JP1 is set as shown. In this position PC13 is
reserved to enable or clear the counter U24 used to measure IDD when
the MCU is in low power mode.
PA0 is connected to WUKP button and MCU power consumption
measurement circuit as LP_WAKEUP when JP14 is set as shown:
JP14
PA0 is connected to ethernet PHY as signal MII_CRS when JP14 is set as
shown: (Default)
Connect +3.3V power to MCU directly when JP23 is set as shown: The
MCU current consumption measurement can be done manually by an
ammeter connected on PJ23 pin 1 & 2. (Default)
JP23
Connect +3.3 V power to MCU with MCU current-sampling resister (1 ohm
or 1 Kohm) in series and IDD current measurement circuit in parallel when
JP23 is set as shown to the right. MCU power consumption measurement
is enabled.
The LED LD7 is lit when the STM3210C-EVAL board is powered by the 5 V correctly.
Description
Doc ID 15082 Rev 3
UM0600
Configuration
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