Datasheet

STM32F103x8, STM32F103xB Description
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Controller area network (CAN)
The CAN is compliant with specifications 2.0A and B (active) with a bit rate up to 1 Mbit/s. It
can receive and transmit standard frames with 11-bit identifiers as well as extended frames
with 29-bit identifiers. It has three transmit mailboxes, two receive FIFOs with 3 stages and
14 scalable filter banks.
Universal serial bus (USB)
The STM32F103xx performance line embeds a 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 except for analog inputs.
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.
I/Os on APB2 with up to 18 MHz toggling speed
ADC (analog-to-digital converter)
Two 12-bit analog-to-digital converters are embedded into STM32F103xx performance line
devices and each ADC shares 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.
Additional logic functions embedded in the ADC interface allow:
● Simultaneous sample and hold
● Interleaved sample and hold
● Single shunt
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) and the advanced-control timer
(TIM1) can be internally connected to the ADC start trigger, injection trigger, and DMA
trigger respectively, to allow the application to synchronize A/D conversion and timers.
Temperature sensor
The temperature sensor has to generate a linear voltage with any variation in temperature.
The conversion range is between 2 V < V
DDA
< 3.6 V. The temperature sensor is internally
connected to the ADC12_IN16 input channel which is used to convert the sensor output
voltage into a digital value.