ST STM32WL55JC Reference Manual page 199

RM0453
byte 1
CalibrateImage() command
CalibrateImage(CalFreq1, CalFreq2) allows the image to be calibrated at given
frequencies, at any time when in Standby mode. The calibration frequencies are defined by
CalFreq1 and CalFreq2. When the calibration is ongoing, BUSY is set. A falling edge on
BUSY indicates the end of calibration. Once performed, the calibration is valid for all
frequencies between the two selected calibration frequencies. Any ISM band can be
covered by selecting the applicable frequency for CalFreq1 and CalFreq2
By default, the image calibration is made in the band 902 - 928 MHz. Nevertheless it is
possible to request a new calibration at other frequencies.
bit 7 Reserved, must be kept at reset value.
bit 6 CalibCfg_Image: Image calibration
0: Image calibration disabled
1: Image calibration enabled
bit 5 CalibCfg_AdcBulkP: RF-ADC bulk P calibration
0: RF-ADC bulk P calibration disabled
1: RF-ADC bulk P calibration enabled
bit 4 CalibCfg_AdcBulkN: RF-ADC bulk N calibration
0: RF-ADC bulk N calibration disabled
1: RF-ADC bulk N calibration enabled
bit 3 CalibCfg_AdcPulse: RF-ADC pulse calibration
0: RF-ADC pulse calibration disabled
1: RF-ADC pulse calibration enabled
bit 2 CalibCfg_Pll: RF-PLL calibration
0: RF-PLL calibration disabled
1: RF-PLL calibration enabled
bit 1 CalibCfg_RC13M: Sub-GHz radio RC 13 MHz calibration
0: Sub-GHz radio RC 13 MHz calibration disabled
1: Sub-GHz radio RC 13 MHz calibration enabled
bit 0 CalibCfg_RC64K: Sub-GHz radio RC 64 kHz calibration
0: Sub-GHz radio RC 64 kHz calibration disabled
1: Sub-GHz radio RC 64 kHz calibration enabled
Table 38. Image calibration for ISM bands
ISM band [MHz]
430 - 440
470 - 510
779 - 787
863 - 870
902 - 928
CallFreq1
0x6B
0x75
0xC1
0xD7
0xE1 (default)
RM0453 Rev 2
Sub-GHz radio (SUBGHZ)
CallFreq2
0x6F
0x81
0xC5
0xDB
0xE9 (default)
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