STM32F101XC datasheet(21/112 Pages) STMICROELECTRONICS

21 / 112 page

STM32F101xC, STM32F101xD, STM32F101xE

Description

Doc ID 14610 Rev 8

21/112

2.3.22

ADC (analog to digital converter)

A 12-bit analog-to-digital converter is embedded into STM32F101xC, STM32F101xD and

STM32F101xE access line devices. It has up to 16 external channels, performing

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.

The events generated by the general-purpose timers (TIMx) can be internally connected to

the ADC start trigger and injection trigger, respectively, to allow the application to

synchronize A/D conversion and timers.

2.3.23

DAC (digital-to-analog converter)

The two 12-bit buffered DAC channels can be used to convert two digital signals into two

analog voltage signal outputs. The chosen design structure is composed of integrated

resistor strings and an amplifier in inverting configuration.

This dual digital Interface supports the following features:

●

two DAC converters: one for each output channel

●

8-bit or 12-bit monotonic output

●

left or right data alignment in 12-bit mode

●

synchronized update capability

●

noise-wave generation

●

triangular-wave generation

●

dual DAC channel independent or simultaneous conversions

●

DMA capability for each channel

●

external triggers for conversion

●

input voltage reference VREF+

Seven DAC trigger inputs are used in the STM32F101xC, STM32F101xD and

STM32F101xE access line family. The DAC channels are triggered through the timer update

outputs that are also connected to different DMA channels.

2.3.24

Temperature sensor

The temperature sensor has to generate a voltage that varies linearly with temperature. The

conversion range is between 2 V < VDDA < 3.6 V. The temperature sensor is internally

connected to the ADC_IN16 input channel which is used to convert the sensor output

voltage into a digital value.

2.3.25

Serial wire JTAG debug port (SWJ-DP)

The ARM SWJ-DP Interface is embedded, and is a combined JTAG and serial wire debug

port that enables either a serial wire debug or a JTAG probe to be connected to the target.

The JTAG TMS and TCK pins are shared respectively with SWDIO and SWCLK and a

specific sequence on the TMS pin is used to switch between JTAG-DP and SW-DP.

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