Datasheet

DocID14771 Rev 15 79/121
STM8S105x4/6 Electrical characteristics
90
Figure 38. Typical NRST pull-up resistance R
PU
vs V
DD
@ 4 temperatures
Figure 39. Typical NRST pull-up current I
pu
vs V
DD
@ 4 temperatures
The reset network shown in Figure 40 protects the device against parasitic resets. The user
must ensure that the level on the NRST pin can go below V
IL(NRST)
max (see Table 41:
NRST pin characteristics), otherwise the reset is not taken into account internally.
For power consumption sensitive applications, the external reset capacitor value can be
reduced to limit the charge/discharge current. If NRST signal is used to reset external
circuitry, attention must be taken to the charge/discharge time of the external capacitor to
fulfill the external devices reset timing conditions. Minimum recommended capacity is
100
nF.