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RM0453 Rev 5 223/1450

RM0453 Sub-GHz radio (SUBGHZ)

227

5.10.55 Sub-GHz radio HSE32 OSC_IN capacitor trim register

(SUBGHZ_HSEINTRIMR)

Address offset: 0x911

Reset value: 0x12

This register is retained in Sleep mode, but lost in Deep-Sleep mode.

5.10.56 Sub-GHz radio HSE32 OSC_OUT capacitor trim register

(SUBGHZ_HSEOUTTRIMR)

Address offset: 0x912

Reset value: 0x12

This register is retained in Sleep mode, but lost in Deep-Sleep mode.

76543210

Res. Res. TRIM[5:0]

rw rw rw rw rw rw

Bits 7:6 Reserved, must be kept at reset value.

Bits 5:0 TRIM[5:0]: HSE32 XTAL mode OSC_IN load capacitor trimming

Load capacitor trimming step size ~0.47 pf.

0x00: minimum value ~11.3 pF

...

0x12 value ~20.3 pF (default)

...

0x2F: maximum capacitor value ~33.4 pF

Others: reserved