STM32F102XB datasheet(17/76 Pages) STMICROELECTRONICS

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STM32F102x8, STM32F102xB

Description

Doc ID 15056 Rev 4

17/76

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)

Two SPIs are able to communicate up to 12 Mbit/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 to 8 bits or 16 bits. The hardware CRC generation/verification

supports basic SD Card/MMC modes.

Both SPIs can be served by the DMA controller.

Universal serial bus (USB)

The STM32F102xx medium-density USB access line embeds an USB device peripheral

compatible with the USB Full-speed 12 Mbs. The USB interface implements a full-speed (12

Mbit/s) function interface. It has software configurable endpoint setting and suspend/resume

support. The dedicated 48 MHz clock is generated from the internal main PLL (the clock

source must use a HSE crystal oscillator).

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 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.

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.

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