STM32F101X6 datasheet(13/74 Pages) STMICROELECTRONICS

13 / 74 page

STM32F101xx

Description

13/74

I²C bus

Up to two I²C bus interfaces can operate in multi-master and slave modes. They can support

standard and fast modes.

They support dual slave addressing (7-bit only) and both 7/10-bit addressing in master

mode. A hardware CRC generation/verification is embedded.

They can be served by DMA and they support SM Bus 2.0/PM Bus.

Universal synchronous/asynchronous receiver transmitter (USART)

The available USART interfaces communicate at up to 2.25 Mbit/s. They provide hardware

management of the CTS and RTS signals, support IrDA SIR ENDEC, are ISO 7816

compliant and have LIN Master/Slave capability.

The USART interfaces can be served by the DMA controller.

Serial peripheral interface (SPI)

Up to two SPIs are able to communicate up to 18 Mbits/s in slave and master modes in full-

duplex and simplex communication modes. The 3-bit prescaler gives 8 master mode

frequencies and the frame is configurable from 8-bit to 16-bit. The hardware CRC

generation/verification supports basic SD Card/MMC modes.

Both SPIs can be served by the DMA controller.

GPIOs (general purpose inputs/outputs)

Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as

input (with or without pull-up or pull-down) or as Peripheral Alternate Function. Most of the

GPIO pins are shared with digital or analog alternate functions. All GPIOs are high current-

capable.

The I/Os alternate function configuration can be locked if needed following a specific

sequence in order to avoid spurious writing to the I/Os registers.

ADC (analog to digital converter)

The 12-bit Analog to Digital Converter has up to 16 external 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 has to generate a linear voltage with any variation in 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.

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