Reset Controller (Rstctrl); Features; Overview - Microchip Technology megaAVR 0 Series Manual

11.

Reset Controller (RSTCTRL)

11.1

Features

• Reset the device and set it to an initial state.
• Reset Flag register for identifying the Reset source in software.
• Multiple Reset sources:
– Power supply Reset sources: Brown-out Detect (BOD), Power-on Reset (POR)
– User Reset sources: External Reset pin (RESET), Watchdog Reset (WDT), Software Reset
(SW), and UPDI Reset.
11.2

Overview

The Reset Controller (RSTCTRL) manages the Reset of the device. It issues a device Reset, sets the
device to its initial state, and allows the Reset source to be identified by software.
11.2.1 Block Diagram
Figure 11-1. Reset System Overview
V
DD
Pull-up
Resistor
RESET
11.2.2 Signal Description
Signal
RESET
©
2018 Microchip Technology Inc.
RESET SOURCES
POR
BOD
FILTER External Reset
WDT
UPDI
CPU (SW)
Description
External Reset (active-low)
RESET CONTROLLER
Datasheet Preliminary
®
megaAVR 0-Series
Reset Controller (RSTCTRL)
All other
Peripherals
Type
Digital input
DS40002015A-page 99
UPDI