upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 861

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 26 Reset
Features summary
Figure 26-1
26.1.1 General reset performance
26.1 Overview
Preliminary User’s Manual U17566EE1V2UM00
Several system reset functions are provided in order to initialize hardware and
registers.
A reset can be caused by the following events:
• External reset signal RESET
• 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)
The following figure shows the signals involved in the reset function:
Reset function signal diagram
Noise in the external reset signal is eliminated by an analog filter.
RESSTAT
RESCMS
RESWDT
RESPOC
RESET
RESCMM
NPB
RESPOC: RESSTAT = 01
RESEXT: RESSTAT = 02
SYSRES
SYSRESWDT
H
H
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