Expand description
CRS control register
Structs
Type Definitions
Field AUTOTRIMEN
reader - Automatic trimming enable This bit enables the automatic hardware adjustment of TRIM bits according to the measured frequency error between two SYNC events. If this bit is set, the TRIM bits are read-only. The TRIM value can be adjusted by hardware by one or two steps at a time, depending on the measured frequency error value. Refer to Section7.3.4: Frequency error evaluation and automatic trimming for more details.
Field AUTOTRIMEN
writer - Automatic trimming enable This bit enables the automatic hardware adjustment of TRIM bits according to the measured frequency error between two SYNC events. If this bit is set, the TRIM bits are read-only. The TRIM value can be adjusted by hardware by one or two steps at a time, depending on the measured frequency error value. Refer to Section7.3.4: Frequency error evaluation and automatic trimming for more details.
Field CEN
reader - Frequency error counter enable This bit enables the oscillator clock for the frequency error counter. When this bit is set, the CRS_CFGR register is write-protected and cannot be modified.
Field CEN
writer - Frequency error counter enable This bit enables the oscillator clock for the frequency error counter. When this bit is set, the CRS_CFGR register is write-protected and cannot be modified.
Field ERRIE
reader - Synchronization or trimming error interrupt enable
Field ERRIE
writer - Synchronization or trimming error interrupt enable
Field ESYNCIE
reader - Expected SYNC interrupt enable
Field ESYNCIE
writer - Expected SYNC interrupt enable
Field SWSYNC
reader - Generate software SYNC event This bit is set by software in order to generate a software SYNC event. It is automatically cleared by hardware.
Field SYNCOKIE
reader - SYNC event OK interrupt enable
Field SYNCOKIE
writer - SYNC event OK interrupt enable
Field SYNCWARNIE
reader - SYNC warning interrupt enable
Field SYNCWARNIE
writer - SYNC warning interrupt enable
Field TRIM
reader - HSI48 oscillator smooth trimming These bits provide a user-programmable trimming value to the HSI48 oscillator. They can be programmed to adjust to variations in voltage and temperature that influence the frequency of the HSI48. The default value is 32, which corresponds to the middle of the trimming interval. The trimming step is around 67 kHz between two consecutive TRIM steps. A higher TRIM value corresponds to a higher output frequency. When the AUTOTRIMEN bit is set, this field is controlled by hardware and is read-only.
Field TRIM
writer - HSI48 oscillator smooth trimming These bits provide a user-programmable trimming value to the HSI48 oscillator. They can be programmed to adjust to variations in voltage and temperature that influence the frequency of the HSI48. The default value is 32, which corresponds to the middle of the trimming interval. The trimming step is around 67 kHz between two consecutive TRIM steps. A higher TRIM value corresponds to a higher output frequency. When the AUTOTRIMEN bit is set, this field is controlled by hardware and is read-only.