UM1879 Rev 4
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UM1879
Hardware layout and configuration
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10.13
MCU current ammeter
The jumper JP5, labeled Idd, allows the consumption of STM32L476VGT6 to be measured
directly by a built-in current ammeter circuit able to measure from 60nA to 50mA or by
removing the jumper and connecting an ammeter:
•
Jumper on position OFF: STM32L476VGT6 is powered (default).
•
Jumper on position ON: an on-board module is designed to measure from 60nA to
50mA by using several MOSFETs and switching automatically depending on the read
value.
•
No jumper on JP5: an ammeter must be connected to measure the STM32L476VGT6
current through pin 1 and 2 (if there is no ammeter, the STM32L476VGT6 is not
powered).
Table 6. Connector CN2
Pin number
Description
Pin number
Description
1
I2C1_SDA (PB7)
5
+3V3
2
NC
6
NC
3
I2C1_SCL (PB6)
7
GND
4
EXT_RST(PD0)
8
NC
