Datasheet

MCP6S21/2/6/8
DS21117B-page 24  2003-2012 Microchip Technology Inc.
5.4 Power-On Reset
If the power supply voltage goes below the POR trip
voltage (V
DD
< V
POR
 1.7V), the internal POR circuit
will reset all of the internal registers to their power-up
defaults (this is a protection against low power supply
voltages). The POR circuit also holds the part in shut-
down mode while it is activated. It temporarily overrides
the software shutdown status. The POR releases the
shutdown circuitry once it is released (V
DD
> V
POR
).
A 0.1 µF bypass capacitor mounted as close as possi-
ble to the V
DD
pin provides additional transient
immunity.