STM32C011F6U6 datasheet(20/94 Pages) STMICROELECTRONICS

20 / 94 page

Functional overview

STM32C011x4/x6

20/94

DS13866 Rev 3

3.14.1

Temperature sensor

The temperature sensor (TS) generates a voltage VTS that varies linearly with temperature.

The temperature sensor is internally connected to an ADC input to convert the sensor

output voltage into a digital value.

The sensor provides good linearity but it has to be calibrated to obtain good overall

accuracy of the temperature measurement. As the offset of the temperature sensor may

vary from part to part due to process variation, the uncalibrated internal temperature sensor

is suitable only for relative temperature measurements.

To improve the accuracy of the temperature sensor, each part is individually factory-

calibrated by ST. The resulting calibration data are stored in the part’s engineering bytes,

accessible in read-only mode.

3.14.2

Internal voltage reference (VREFINT)

The internal voltage reference (VREFINT) provides a stable (bandgap) voltage output for the

ADC. VREFINT is internally connected to an ADC input. The VREFINT voltage is individually

precisely measured for each part by ST during production test and stored in the part’s

engineering bytes. It is accessible in read-only mode.

3.15

Timers and watchdogs

The device includes an advanced-control timer, four general-purpose timers, two low-power

timers, two watchdog timers and a SysTick timer. Table 7 compares features of the

advanced-control, general-purpose and basic timers.

Table 5. Temperature sensor calibration values

Calibration value name

Description

Memory address

TS_CAL1

TS ADC raw data acquired at a

temperature of 30 °C (± 5 °C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x1FFF7568-0x1FFF7569

Table 6. Internal voltage reference calibration values

Calibration value name

Description

Memory address

VREFINT

Raw data acquired at a

temperature of 30 °C (± 5 °C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x1FFF756A-0x1FFF756B

Table 7. Timer feature comparison

Timer type

Timer

Counter

resolution

Counter

type

Maximum

operating

frequency

Prescaler

factor

DMA

request

generation

Capture/

compare

channels

Comple-

mentary

outputs

Advanced-

control

TIM1

16-bit

Up, down,

up/down

48 MHz

Integer from

1 to 216

Yes

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