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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
47
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497
Rev 1.00
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UC02
9L
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UC029
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CHN
ICA
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Power-on-Reset Control Register (PORCR)
Register
Offset
R/W
Description
Reset Value
PORCR
0x24
R/W
Power-on-reset Controller Register
0x0000_XXXX
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
POR_DIS_CODE
7
6
5
4
3
2
1
0
POR_DIS_CODE
Bits
Description
[31:16]
Reserved
Reserved.
[15:0]
POR_DIS_CODE
Power-On-Reset Enable Bit (Write Protect)
When powered on, the POR circuit generates a reset signal to reset the whole chip
function, but noise on the power may cause the POR active again. User can disable
internal POR circuit to avoid unpredictable noise to cause chip reset by writing 0x5AA5 to
this field.
The POR function will be active again when this field is set to another value or chip is
reset by other reset source, including:
nRESET, Watchdog Timer reset, Window Watchdog Timer reset, LVR reset, BOD reset,
ICE reset command and the software-chip reset function
Note:
This bit is the protected bit. It means programming this needs to write “59h”, “16h”,
“88h” to address 0x5000_0100 to disable register protection. Refer to the register
REGWRPROT at address 0x100.