NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
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-M0 Microcontroller
Aug, 2018
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1 = 32.768 kHz external low speed crystal oscillator (LXT) Enabled (Normal operation).
Note:
This bit is the protected bit, and programming it needs to write “59h”, “16h”, and
“88h” to address 0x5000_0100 to disable register protection. Refer to the register
REGWRPROT at address 0x100.
[0]
XTL12M_EN
4~24 MHz External High Speed Crystal Oscillator (HXT) Enable Bit (Write Protect)
The bit default value is set by flash controller user configuration register CONFIG0 [26:24].
When the default clock source is from 4~24 MHz external high speed crystal oscillator, this
bit is set to 1 automatically.
0 = 4 ~ 24 MHz external high speed crystal oscillators (HXT) Disabled.
1 = 4~24 MHz external high speed crystal oscillator (HXT) Enabled.
Note:
This bit is the protected bit, and programming it needs to write “59h”, “16h”, and
“88h” to address 0x5000_0100 to disable register protection. Refer to the register
REGWRPROT at address 0x100.