Description
STM32F103xC, STM32F103xD, STM32F103xE
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-density and high-density devices are an extension of the STM32F103x8/B medium-
density 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 additional peripherals like SDIO, FSMC, I2S and DAC while
remaining fully compatible with the other members of the family.
The STM32F103x4, STM32F103x6, STM32F103xC, STM32F103xD and STM32F103xE
are a drop-in replacement for the STM32F103x8/B 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
Pinout Flash
32 KB
Flash(1)
64 KB
Flash
128 KB
Flash
6 KB RAM 10 KB RAM 20 KB RAM 20 KB RAM
256 KB
Flash
48 or
64 KB(2)
RAM
384 KB
Flash
512 KB
Flash
64 KB RAM 64 KB RAM
144
100
64 2 × USARTs
2 × 16-bit timers
1 × SPI, 1 × I2C, USB,
48 CAN, 1 × PWM timer
36 2 × ADCs
3 × USARTs
3 × 16-bit timers
2 × SPIs, 2 × I2Cs, USB,
CAN, 1 × PWM timer
2 × ADCs
5 × USARTs
4 × 16-bit timers, 2 × basic timers
3 × SPIs, 2 × I2Ss, 2 × I2Cs
USB, CAN, 2 × PWM timers
3 × ADCs, 2 × DACs, 1 × SDIO
FSMC (100- and 144-pin packages(3))
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.
2. 64 KB RAM for 256 KB Flash are available on devices delivered in CSP packages only.
3. Ports F and G are not available in devices delivered in 100-pin packages.
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Doc ID 14611 Rev 7