STM32F051C4 STMicroelectronics, STM32F051C4 Datasheet - Page 21

• Manufacturer Part Number: STM32F051C4
• Description: Entry-level ARM Cortex-M0 MCU with 16 Kbytes Flash, 48 MHz CPU, motor control and CEC functions
• Manufacturer: STMicroelectronics

Specifications of STM32F051C4

• Voltage Range: 2.0 V to 3.6 V
• Conversion Range: 0 to 3.6V
• Systick Timer: 24-bit downcounter

STM32F051x
3.19
3.19.1
3.19.2
Table 9.
Analog to digital converter (ADC)
The 12-bit analog to digital converter has up to 16 external and 3 internal (temperature
sensor, voltage reference, VBAT voltage measurement) channels and performs conversions
in single-shot or scan modes. In scan mode, automatic conversion is performed on a
selected group of analog inputs.
The ADC can be served by the DMA controller.
An analog watchdog feature allows very precise monitoring of the converted voltage of one,
some or all selected channels. An interrupt is generated when the converted voltage is
outside the programmed thresholds.
Temperature sensor
The temperature sensor generates a voltage that varies linearly with temperature. The
conversion range is between 2 V < V
connected to the ADC_IN16 input channel which is used to convert the sensor output
voltage into a digital value.
As the offset of the temperature sensor varies from chip to chip due to process variation, the
internal temperature sensor is mainly suitable for applications that detect temperature
changes instead of absolute temperatures. If an accurate temperature reading is needed,
then an external temperature sensor part should be used.
V
This embedded hardware feature allows the application to measure the V
using the internal ADC channel ADC_IN18. As the V
and thus outside the ADC input range, the V
divider by 2. As a consequence, the converted digital value is half the V
BAT
Number of capacitive
Analog I/O group
sensing channels
battery voltage monitoring
G1
G2
G3
G4
G5
G6
No. of capacitive sensing channels available on STM32F051xx devices
STM32F051Rx
Doc ID 018746 Rev 2
18
3
3
3
3
3
3
DDA
Number of capacitive sensing channels
< 3.6 V. The temperature sensor is internally
BAT
pin is internally connected to a bridge
STM32F051Cx
BAT
17
voltage may be higher than V
3
3
2
3
3
3
Functional overview
BAT
BAT
STM32F051Kx
voltage.
battery voltage
14
3
3
2
3
3
0
DDA
21/22
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