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STM32W108HB Datasheet(PDF) 138 Page - STMicroelectronics |
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STM32W108HB Datasheet(HTML) 138 Page - STMicroelectronics |
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138 / 179 page  Analog-to-digital converter STM32W108CB, STM32W108HB 138/179 Doc ID 16252 Rev 2 9.3 Analog-to-digital converter (ADC) registers 9.3.1 ADC configuration register (ADC_CFG) Address offset: 0xD004 Reset value: 0x0000 1800 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ADC_PERIOD ADC_ HVSE LP ADC_ HVSE LN ADC_MUXP ADC_ MUXP ADC_MUXN ADC_1 MHZC LK ST Re- served ADC_E NABLE rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw [15:13] ADC_PERIOD: ADC sample time in clocks and the equivalent significant bits in the conversion. 0: 32 clocks (5 bits).4: 512 clocks (9 bits). 1: 64 clocks (6 bits).5: 1024 clocks (10 bits). 2: 128 clocks (7 bits).6: 2048 clocks (11 bits). 3: 256 clocks (8 bits).7: 4096 clocks (12 bits). [12] ADC_HVSELP: Select voltage range for the P input channel. 0: Low voltage range (input buffer disabled). 1: High voltage range (input buffer enabled). [11] ADC_HVSELN: Select voltage range for the N input channel. 0: Low voltage range (input buffer disabled). 1: High voltage range (input buffer enabled). [10:7] ADC_MUXP: Input selection for the P channel. 0x0: PB5 pin.0x8: GND (0V) (not for high voltage range). 0x1: PB6 pin.0x9: VREF/2 (0.6V). 0x2: PB7 pin.0xA: VREF (1.2V). 0x3: PC1 pin.0xB: VREG/2 (0.9V) (not for high voltage range). 0x4: PA4 pin.0x6, 0x7, 0xC-0xF: Reserved. 0x5: PA5 pin. [6:3] ADC_MUXN: Input selection for the N channel. Refer to ADC_MUXP above for choices. [2] ADC_1MHZCLK: Select ADC clock: 0: 6 MHz1: 1 MHz. [1] Reserved: this bit must always be set to 0. [0] ADC_ENABLE: Enable the ADC: write 1 to enable continuous conversions, write 0 to stop. When the ADC is started the first conversion takes twice the usual number of clocks plus 21 microseconds. If anything in this register is modified while the ADC is running, the next conversion takes twice the usual number of clocks. |
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