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1 Introduction
This datasheet provides the ordering information and mechanical device characteristics of
the STM32F103x8 and STM32F103xB medium-density performance line microcontrollers.
For more details on the whole STMicroelectronics STM32F103xx family， please refer to
Section 2.2： Full compatibility throughout the family.
The medium-density STM32F103xx datasheet should be read in conjunction with the low-，
medium- and high-density STM32F10xxx reference manual.
The reference and Flash programming manuals are both available from the
STMicroelectronics website www.st.com.
For information on the Cortex™-M3 core please refer to the Cortex™-M3 Technical
Reference Manual， available from the www.arm.com website at the following address：
http://infocenter.arm.com/help/index.jsp？topic=/com.arm.doc.ddi0337e/。
2 Description
The STM32F103xx medium-density performance line family incorporates the highperformance ARM Cortex™-M3 32-bit RISC core operating at a 72 MHz frequency， highspeed embedded memories （Flash memory up to 128 Kbytes and SRAM up to 20 Kbytes），
and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All
devices offer two 12-bit ADCs， three general purpose 16-bit timers plus one PWM timer， as
well as standard and advanced communication interfaces： up to two I2Cs and SPIs， three
USARTs， an USB and a CAN.
The devices operate from a 2.0 to 3.6 V power supply. They are available in both the –40 to
+85 °C temperature range and the –40 to +105 °C extended temperature range. A
comprehensive set of power-saving mode allows the design of low-power applications.
The STM32F103xx medium-density performance line family includes devices in six different
package types： from 36 pins to 100 pins. Depending on the device chosen， different sets of
peripherals are included， the description below gives an overview of the complete range of
peripherals proposed in this family.
These features make the STM32F103xx medium-density performance line microcontroller
family suitable for a wide range of applications such as motor drives， application control，
medical and handheld equipment， PC and gaming peripherals， GPS platforms， industrial
applications， PLCs， inverters， printers， scanners， alarm systems， video intercoms， and
HVAC
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