Datasheet

Description STM32F102x8, STM32F102xB
12/80 DocID15056 Rev 5
2.2 Full compatibility throughout the family
The STM32F102xx is a complete family whose members are fully pin-to-pin, software and
feature compatible. In the reference manual, the STM32F102x4 and STM32F102x6 are
referred to as low-density devices and the STM32F102x8 and STM32F102xB are referred
to as medium-density devices.
Low-density devices are an extension of the STM32F102x8/B devices, they are specified in
the STM32F102x4/6 datasheet. Low-density devices feature lower Flash memory and RAM
capacities, a timer and a few communication interfaces less.
The STM32F102x4 and STM32F102x6 are a drop-in replacement for the STM32F102x8/B
medium-density devices, allowing the user to try different memory densities and providing a
greater degree of freedom during the development cycle.
Moreover the STM32F102xx family is fully compatible with all existing STM32F101xx
access line and STM32F103xx performance line devices.
2.3 Overview
ARM
®
Cortex™-M3 core with embedded Flash and SRAM
The ARM Cortex™-M3 processor is the latest generation of ARM processors for embedded
systems. It has been developed to provide a low-cost platform that meets the needs of MCU
implementation, with a reduced pin count and low-power consumption, while delivering
outstanding computational performance and an advanced system response to interrupts.
The ARM Cortex™-M3 32-bit RISC processor features exceptional code-efficiency,
delivering the high-performance expected from an ARM core in the memory size usually
associated with 8- and 16-bit devices.
The STM32F102xx medium-density USB access line having an embedded ARM core, is
therefore compatible with all ARM tools and software.
Embedded Flash memory
64 or 128 Kbytes of embedded Flash is available for storing programs and data.
Table 3. STM32F102xx USB access line family
Pinout
Low-density STM32F102xx devices Medium-density STM32F102xx devices
16 KB Flash 32 KB Flash
(1)
1. For orderable part numbers that do not show the A internal code after the temperature range code (6), the
reference datasheet for electrical characteristics is that of the STM32F102x8/B medium-density devices.
64 KB Flash 128 KB Flash
4 KB RAM 6 KB RAM 10 KB RAM 16 KB RAM
64
2 × USARTs, 2 × 16-bit timers
1 × SPI, 1 × I
2
C, 1 × ADC, 1 × USB
3 × USARTs, 3 × 16-bit timers
2 × SPIs, 2 × I2Cs, 1 × ADC, 1 × USB
48
36 - -
2 × USARTs, 3 × 16-
bit timers
1× SPI, 1× I2C, 1 ×
ADC, 1 × USB
-