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NUC140-RB3E Datasheet(Fiches technique) 49 Page - Nuvoton Technology Corporation

Numéro de pièce NUC140-RB3E
Description  ARM® Cortex®-M 32-bit Microcontroller
Télécharger  107 Pages
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Fabricant  NUVOTON [Nuvoton Technology Corporation]
Site Internet  http://www.nuvoton.com
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 49 page
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NUC100/120xxxDN
Aug 31, 2015
Page 49 of 107
Rev 1.01
AVDD voltage is lower than VLVR and the state keeps longer than De-glitch time (16*HCLK cycles),
chip will be reset. The LVR reset will control the chip in reset state until the AVDD voltage rises
above VLVR and the state keeps longer than De-glitch time. The RSTS_RESET (RSTSRC[1]) will
be set to 1 if the previous reset source is nRESET reset. Figure 6-5 shows the Low Voltage Reset
waveform.
AVDD
VLVR
Low Voltage Reset
T1
(<De-glitch time)
T2
(=De-glitch time)
T3
(=De-glitch time)
LVR_EN
100 us
Delay for LVR stable
Figure 6-5 Low Voltage Reset (LVR) Waveform
Brown-out Detector Reset (BOD Reset)
6.2.2.4
If the Brown-out Detector (BOD) function is enabled by setting the Brown-out Detector Enable Bit
BOD_EN (BODCR[0]), Brown-Out Detector function will detect AVDD during system operation.
When the AVDD voltage is lower than VBOD which is decided by BOD_EN (BODCR[0]) and
BOD_VL (BODCR[2:1]) and the state keeps longer than De-glitch time (Max(20*HCLK cycles,
1*LIRC cycle)), chip will be reset. The BOD reset will control the chip in reset state until the AVDD
voltage rises above VBOD and the state keeps longer than De-glitch time. The default value of
BOD_EN, BOD_VL and BOD_RSTEN is set by flash controller user configuration register
CBODEN
(CONFIG0[23]),
CBOV1-0
(CONFIG0[22:21])
and
CBORST
(CONFIG0[20])
respectively. User can determine the initial BOD setting by setting the CONFIG0 register. Figure
6-6 shows the Brown-Out Detector waveform.




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