Operation

STM1810/1811/1812/1813/1815/1816/1817/1818

10/25

Doc ID11464 Rev 8

2.5

circuit. In most systems this is not a problem, as most MCUs do not operate below 1 V.

However, in applications where RST output must be valid down to 0 V, a pull-down resistor

may be added to hold the RST output low (see Figure 11). This resistor must be large

enough to not load the RST output, and still be small enough to pull the output to ground.

A 100 k

Ω resistor is recommended.

Note:

The same situation applies for the active-high RST of the STM1810/1812. A 100 k

Figure 7.

Reset timing diagram

1.

RST for STM1812 and STM1817.

Figure 8.

Push-button manual reset with MR detect (STM1813/1818)