M263 datasheet(269/398 Pages) NUVOTON

269 / 398 page

M261/M262/M263

Mar 25, 2020

Page 269 of 398

Rev 1.02

Low Voltage

Reset

Power-on

Reset

Brown-out

Reset

Reset Pulse Width

~3.2ms

WDT/WWDT

Reset

System Reset

~50k ohm

@3.3v

Reset Pulse Width

2 system clocks

nRESET

VDD

AVDD

CHIP Reset

CHIPRST(SYS_IPRST0[0])

CPU Reset

CPURST(SYS_IPRST0[1])

CPU Lockup

Reset

System Reset

SYSRESETREQ(AIRCR[2])

LVREN(SYS_BODCTL[7])

BODRSTEN(SYS_BODCTL[3])

PORMASK(SYS_PORCTL0[15:0])

Reset Pulse Width

64 WDT clocks

Reset Pulse Width

2 system clocks

Glitch Filter

32 us

Software Reset

POROFF(SYS_PORCTL1[15:0])

Figure 6.2-1 System Reset Sources

There are a total of 9 reset sources in the NuMicro

® family. In general, CPU reset is used to reset

Cortex

® -M23 only; the other reset sources will reset Cortex® -M23 and all peripherals. However, there

are small differences between each reset source and they are listed in Table 6.2-1.

Reset Sources

POR

NRESET

WDT

LVR

BOD

Lockup

CHIP

SYSTEM

CPU

SYS_RSTSTS

Bit 0 = 1

Bit 1 = 1

Bit 2 = 1

Bit 3 = 1

Bit 4 = 1

Bit 8 = 1

Bit 0 = 1

Bit 5 = 1

Bit 7 =

CHIPRST

(SYS_IPRST0[0])

0x0

BODEN

(SYS_BODCTL[0])

Reload

from

CONFIG0

Reload

from

CONFIG0

Reload

from

CONFIG0

Reload

from

CONFIG0

Reload

from

CONFIG0

Reload

from

CONFIG0

Reload

from

CONFIG0

BODVL

(SYS_BODCTL[18:16])

BODRSTEN

(SYS_BODCTL[3])

SYS_SRAMPCTL

0x0

SYS_SRAMPPCT

0x0

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