Datasheet

DocID17659 Rev 9 81/131
STM32L151x6/8/B, STM32L152x6/8/B Electrical characteristics
105
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 Table 41.
Note: It is recommended to add a Schottky diode (pin to ground) to analog pins which may
potentially inject negative currents.
Table 41. I/O current injection susceptibility
Symbol Description
Functional susceptibility
Unit
Negative
injection
Positive
injection
I
INJ
Injected current on all 5 V tolerant (FT) pins -5 +0
mA
Injected current on any other pin -5 +5