Description
STM32F103x4, STM32F103x6
2.2
Full compatibility throughout the family
The STM32F103xx is a complete family whose members are fully pin-to-pin, software and
feature compatible. In the reference manual, the STM32F103x4 and STM32F103x6 are
identified as low-density devices, the STM32F103x8 and STM32F103xB are referred to as
medium-density devices, and the STM32F103xC, STM32F103xD and STM32F103xE are
referred to as high-density devices.
Low- and high-density devices are an extension of the STM32F103x8/B devices, they are
specified in the STM32F103x4/6 and STM32F103xC/D/E datasheets, respectively. Low-
density devices feature lower Flash memory and RAM capacities, less timers and
peripherals. High-density devices have higher Flash memory and RAM capacities, and
2
additional peripherals like SDIO, FSMC, I S and DAC, while remaining fully compatible with
the other members of the STM32F103xx family.
The STM32F103x4, STM32F103x6, STM32F103xC, STM32F103xD and STM32F103xE
are a drop-in replacement for STM32F103x8/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 STM32F103xx performance line family is fully compatible with all existing
STM32F101xx access line and STM32F102xx USB access line devices.
Table 3.
STM32F103xx family
Low-density devices Medium-density devices
High-density devices
16 KB
Flash
32 KB
64 KB
Flash
128 KB
Flash
256 KB
Flash
384 KB
Flash
512 KB
Flash
Pinout
Flash(1)
6 KB RAM 10 KB RAM 20 KB RAM 20 KB RAM 48 KB RAM 64 KB RAM 64 KB RAM
144
100
5 × USARTs
4 × 16-bit timers, 2 × basic timers
3 × SPIs, 2 × I2Ss, 2 × I2Cs
3 × USARTs
USB, CAN, 2 × PWM timers
3 × ADCs, 2 × DACs, 1 × SDIO
FSMC (100 and 144 pins)
3 × 16-bit timers
2 × USARTs
64
2 × SPIs, 2 × I2Cs, USB,
CAN, 1 × PWM timer
2 × ADCs
2 × 16-bit timers
1 × SPI, 1 × I2C, USB,
CAN, 1 × PWM timer
2 × ADCs
48
36
1. For orderable part numbers that do not show the A internal code after the temperature range code (6 or 7),
the reference datasheet for electrical characteristics is that of the STM32F103x8/B medium-density
devices.
12/80
Doc ID 15060 Rev 3
STMICROELECTRONICS [ ST ]
