STMicroelectronics STM32L151CB Manual page 72

Electrical characteristics
Functional susceptibility to I/O current injection
While a simple application is executed on the device, the device is stressed by injecting
current into the I/O pins programmed in floating input mode. While current is injected into the
I/O pin, one at a time, the device is checked for functional failures.
The failure is indicated by an out of range parameter: ADC error, out of spec current
injection on adjacent pins or other functional failure (for example reset, oscillator frequency
deviation, LCD levels, etc.).
The test results are given in the following table.
Table 37.
Symbol
I
INJ
72/109
I/O current injection susceptibility
Description
Injected current on true open-drain pins
Injected current on all 5 V tolerant (FT) pins
Injected current on any other pin
Doc ID 17659 Rev 6
STM32L151xx, STM32L152xx
Functional susceptibility
Negative Positive
injection injection
-5 +0
-5 +0
-5 +5
Unit
mA