RM0453 Rev 1 215/1461
RM0453 Sub-GHz radio (SUBGHZ)
218
5.10.25 Sub-GHz radio HSE32 OSC_OUT capacitor trim register
(SUBGHZ_HSEOUTTRIMR)
Address offset: 0x0912
Reset value: 0x12
This register is retained in Sleep mode, but lost in Deep-Sleep mode.
5.10.26 Sub-GHz radio SMPS control 0 register (SUBGHZ_SMPSC0R)
Address offset: 0x0916
Reset value: 0x00
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
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_OUT 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
76543210
Res. CLKDE Res. Res. Res. Res. Res. Res.
rw
Bit 7 Reserved, must be kept at reset value.
Bit 6 CLKDE: SMPS clock detection enable
SMPS clock detection must be enabled before enabling the SMPS.
0: SMPS clock detection disabled
1: SMPS clock detection enabled
Bits 5:0 Reserved, must be kept at reset value.
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