Global Clock Status Register - Gcsr - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230
Global Clock Status Register – GCSR
This register indicates the clock ready status.
Offset: 0x008
Reset value: 0x0000_0028
31
Type/Reset
23
Type/Reset
15
Type/Reset
7
Reserved
Type/Reset
Bits Field
[5] LSIRDY
[3] HSIRDY
[2] HSERDY
[1] PLLRDY
Rev. 1.10
30 29 28
22 21 20
14 13 12
6 5 4
LSIRDY Reserved
RO 1
Descriptions
Internal Low Speed Oscillator Ready Flag
0: Internal 32 kHz RC oscillator is not ready
1: Internal 32 kHz RC oscillator is ready
Set by hardware to indicate whether the LSI oscillator is stable to be used.
Internal High Speed Oscillator Ready Flag
0: Internal 8 MHz RC oscillator is not ready
1: Internal 8 MHz RC oscillator is ready
Set by hardware to indicate whether the HSI oscillator is stable to be used.
External High Speed Oscillator Ready Flag
0: External 4 ~ 16 MHz crystal oscillator is not ready
1: External 4 ~ 16 MHz crystal oscillator is ready
Set by hardware to indicate whether the HSE oscillator is stable to be used.
PLL Clock Ready Flag
0: PLL is not ready
1: PLL is ready
Set by hardware to indicate whether the PLL output clock is stable to be used.
82 of 366
27 26
Reserved
19 18
Reserved
11 10
Reserved
3 2
HSIRDY HSERDY PLLRDY
RO 1 RO 0 RO
25 24
17 16
9 8
1 0
Reserved
0
November 09, 2018