Reset Control Unit (Rstcu); Introduction; Figure 17. Rstcu Block Diagram - Holtek HT32F50231 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F50231/HT32F50241
7

Reset Control Unit (RSTCU)

Introduction

The Reset Control Unit, RSTCU, has three kinds of reset, the power on reset, system reset and
APB unit reset. The power on reset, known as a cold reset, resets the full system during a power
up. A system reset resets the processor core and peripheral IP components with the exception of
the debug port controller. The resets can be triggered by an external signal, internal events and the
reset generators. More information about these resets will be described in the following section.
RSTCU
1.5 V Core
V
POR15
DD15
Filter
Power
RESET
BODRST
Filter
Brown Out
V
DD
Detector
RESET
nRST Filter
WDT_RSTn
SYSRESETREQ
----
V
V DD
POR
DD
Domain
Filter
POR
PWCURST
Reset
WDTRST
generator
Reset
USRRST
generator

Figure 17. RSTCU Block Diagram

Rev. 1.00
PORRESETn SYSRESETREQ
Delay
SYSRESETn
RTC/PWRCU reset
WDT reset
PORRESETn
USART reset
98 of 486
®
Cortex -M0+
NVIC
CM0+ Core
SYSRESETREQ
HRESETn CORERESTn
HRESETn
System Components
(BusMatrix, PMU)
System Debug
Components
July 31, 2018