STM32W108C8U63TR STMicroelectronics, STM32W108C8U63TR Datasheet - Page 160
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STM32W108C8U63TR
Manufacturer Part Number
STM32W108C8U63TR
Description
16/32-BITS MICROS
Manufacturer
STMicroelectronics
Series
STM32r
Datasheet
1.STM32W108C8U63TR.pdf
(207 pages)
Specifications of STM32W108C8U63TR
Applications
RF4CE, Remote Control
Core Processor
ARM® Cortex-M3™
Program Memory Type
FLASH (64 kB)
Controller Series
STM32W
Ram Size
8K x 8
Interface
I²C, SPI, UART/USART
Number Of I /o
24
Voltage - Supply
1.18 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-VFQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Table 29.
Input range
ADC inputs can be routed through input buffers to expand the input voltage range. The input
buffers have a fixed 0.25 gain and the converted data is scaled by that factor.
With the input buffers disabled the single-ended input range is 0 to VREF and the differential
input range is -VREF to +VREF. With the input buffers enabled the single-ended range is 0
to VDD_PADS and the differential range is -VDD_PADS to +VDD_PADS.
The input buffers are enabled for the ADC P and N inputs by setting the ADC_HVSELP and
ADC_HVSELN bits respectively, in the ADC_CFG register. The ADC accuracy is reduced
when the input buffer is selected.
Sample time
ADC sample time is programmed by selecting the sampling clock and the clocks per
sample.
●
●
Table 30
results.
Table 30.
ADC5
GND
VREF
VDD_PADSA/2
ADC_PERIOD
ADC P input
The sampling clock may be either 1 MHz or 6 MHz. If the ADC_1MHZCLK bit in the
ADC_CFG register is clear, the 6 MHz clock is used; if it is set, the 1 MHz clock is
selected. The 6 MHz sample clock offers faster conversion times but the ADC
resolution is lower than that achieved with the 1 MHz clock.
The number of clocks per sample is determined by the ADC_PERIOD bits in the
ADC_CFG register. ADC_PERIOD values select from 32 to 4096 sampling clocks in
powers of two. Longer sample times produce more significant bits. Regardless of the
sample time, converted samples are always 16-bits in size with the significant bits left-
aligned within the value.
0
1
2
3
4
5
shows the options for ADC sample times and the significant bits in the conversion
Typical ADC input configurations (continued)
ADC sample times
Sample
clocks
1024
128
256
512
32
64
VREF/2
ADC4
VREF/2
VREF/2
ADC N input
1 MHz clock 6 MHz clock 1 MHz clock 6 MHz clock
1024
128
256
512
Sample time (µs)
32
64
Doc ID 018587 Rev 1
5.33
10.7
21.3
42.7
85.3
ADC_MUXP
170
10
11
5
8
Sample frequency (kHz)
0.977
31.3
15.6
7.81
3.91
1.95
ADC_MUXN
4
9
9
9
93.8
46.9
23.4
11.7
5.86
188
Calibration
Differential
Calibration
Calibration
STM32W108C8
Purpose
Significant
bits
10
5
6
7
8
9
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