STM32W108CBU6 STMICROELECTRONICS [STMicroelectronics], STM32W108CBU6 Datasheet - Page 138

• Manufacturer Part Number: STM32W108CBU6
• Description: High-performance, IEEE 802.15.4 wireless system-on-chip
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Analog-to-digital converter
9.3
9.3.1
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15
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ADC_PERIOD
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14
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[15:13] ADC_PERIOD: ADC sample time in clocks and the equivalent significant bits in the conversion.
[10:7] ADC_MUXP: Input selection for the P channel.
Analog-to-digital converter (ADC) registers
ADC configuration register (ADC_CFG)
Address offset: 0xD004
Reset value:
[6:3] ADC_MUXN: Input selection for the N channel.
[12] ADC_HVSELP: Select voltage range for the P input channel.
[11] ADC_HVSELN: Select voltage range for the N input channel.
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[2] ADC_1MHZCLK: Select ADC clock:
[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.
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).
0: Low voltage range (input buffer disabled).
1: High voltage range (input buffer enabled).
0: Low voltage range (input buffer disabled).
1: High voltage range (input buffer enabled).
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.
Refer to ADC_MUXP above for choices.
0: 6 MHz1: 1 MHz.
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.
HVSE
ADC_
LP
28
12
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ADC_
HVSE
LN
27
11
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0x0000 1800
26
10
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ADC_MUXP
25
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9
Doc ID 16252 Rev 2
24
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8
MUXP
ADC_
23
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7
22
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6
ADC_MUXN
21
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5
STM32W108CB, STM32W108HB
20
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4
19
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3
ADC_1
MHZC
18
LK
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2
ST Re-
served
17
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1
ADC_E
NABLE
16
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0