STM32F732IE datasheet(46/226 Pages) STMICROELECTRONICS

46 / 226 page

Functional overview

STM32F732xx STM32F733xx

46/226

DS11854 Rev 6

3.35

Temperature sensor

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

The conversion range is between 1.7 V and 3.6 V. The temperature sensor is internally

connected to the same input channel as VBAT, ADC1_IN18, which is used to convert the

sensor output voltage into a digital value. When the temperature sensor and VBAT

conversion are enabled at the same time, only VBAT conversion is performed.

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 must be used.

3.36

Digital-to-analog converter (DAC)

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

analog voltage signal outputs.

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+

Eight DAC trigger inputs are used in the device. The DAC channels are triggered through

the timer update outputs that are also connected to different DMA streams.

3.37

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 debug is performed using two pins only instead of five required by the JTAG (JTAG pins

can be reused as GPIO with alternate function): JTAG TMS and TCK pins are shared with

SWDIO and SWCLK, respectively, and a specific sequence on the TMS pin is used to

switch between JTAG-DP and SW-DP.

3.38

Embedded Trace Macrocell™

The Arm Embedded Trace Macrocell provides a greater visibility of the instruction and data

flow inside the CPU core by streaming compressed data at a very high rate from the

STM32F732xx and STM32F733xx device through a small number of ETM pins to an

external hardware trace port analyser (TPA). The TPA is connected to a host computer

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