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Chapter 26 Reset
Features summary
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Several system reset functions are provided in order to initialize hardware and
registers.
26.1 Overview
A reset can be caused by the following events:
• External reset signal RESET
Noise in the external reset signal is eliminated by an analog filter.
• Power-On-Clear (internal signal RESPOC)
• Overflow of the Watchdog Timer (internal signal RESWDT)
• Main or sub-oscillator fails (internal signals RESCMM, RESCMS)
As output, the reset function provides two internal reset signals:
• SYSRES (system reset)
• SYSRESWDT (Watchdog Timer reset)
26.1.1 General reset performance
The following figure shows the signals involved in the reset function:
RESSTAT
RESPOC
RESET
RESCMM
RESCMS
RESWDT
Figure 26-1
Reset function signal diagram
Preliminary User's Manual U17566EE1V2UM00
NPB
RESPOC: RESSTAT = 01
H
RESEXT: RESSTAT = 02
H
SYSRES
SYSRESWDT
861
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