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STUW81300 Datasheet(PDF) 44 Page - STMicroelectronics |
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STUW81300 Datasheet(HTML) 44 Page - STMicroelectronics |
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44 / 63 page  Circuit description STuW81300 44/63 DS11314 Rev 7 ST6 Register Address: STuW81300BaseAddress + 0x06 Type: R/W Description: VCO Calibrator, Manual VCO control, DSM settings 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RW RW RW RW RW RW RW RW RW RW RW RW [26] DITHERING: at ‘1’ enables dithering of DSM output sequence [25] CP_UP_OFF: for test purposes only; must be set to ‘0’ [24] CP_DN_OFF: for test purposes only; must be set to ‘0’ [23:22] DSM_ORDER: set the order of delta-sigma modulator 00: (0) 3rd order DSM (recommended) 01: (1) 2nd order DSM 10: (2) 1st order DSM 11: (3) 4th order DSM [21] RESERVED: must be set to ‘0’ [20] EN_AUTOCAL: 1: enable the VCO calibration auto-restart feature This feature is not available on product codes STUW81300-1T and STUW81300-1TR. This bit must be set to ‘0’ on these [19:18] VCO_SEL: VCO selection bit. For test purposes only. 00: (0) VCO_LOW 01: (1) VCO_LOW_MID 10: (2) VCO_MID_HIGH 11: (3) VCO_HIGH [17:13] VCO_WORD: select specific VCO sub-band (range:0 to 31). For test purposes only. [12] CAL_TEMP_COMP: temperature compensation for VCO calibration procedure (to be used when PLL Lock condition is required on extreme thermal cycles) 0: compensation disabled (to be used with switching-frequency applications) 1: compensation enabled (to be used with fixed-frequency applications) |
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