The STM32F105xx and STM32F107xx connectivity line family incorporates the high-performance ARM? Cortex?-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed embedded memories (Flash memory up to 256 Kbytes and SRAM 64 Kbytes), and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer two 12-bit ADCs, four general-purpose 16-bit timers plus a PWM timer, as well as standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2Ss, five USARTs, an USB OTG FS and two CANs. Ethernet is available on the STM32F107xx only. The STM32F105xx and STM32F107xx connectivity line family operates in the –40 to +105 °C temperature range, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.
The STM32F105xx and STM32F107xx connectivity line family offers devices in three different package types: from 64 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 STM32F105xx and STM32F107xx connectivity line microcontroller family suitable for a wide range of applications such as motor drives and application control, medical and handheld equipment, industrial applications, PLCs, inverters, printers, and scanners, alarm systems, video intercom, HVAC and home audio equipment.
Figure 1 shows the general block diagram of the device family.

All features
Core: ARM? 32-bit Cortex?-M3 CPU
72 MHz maximum frequency, 1.25 DMIPS/MHz (Dhrystone 2.1) performance at 0 wait state memory access
Single-cycle multiplication and hardware division

Memories
64 to 256 Kbytes of Flash memory
64 Kbytes of general-purpose SRAM

Clock, reset and supply management
2.0 to 3.6 V application supply and I/Os
POR, PDR, and programmable voltage detector (PVD)
3-to-25 MHz crystal oscillator
Internal 8 MHz factory-trimmed RC
Internal 40 kHz RC with calibration
32 kHz oscillator for RTC with calibration

Low power
Sleep, Stop and Standby modes
VBAT supply for RTC and backup registers

2 × 12-bit, 1 μs A/D converters (16 channels)
Conversion range: 0 to 3.6 V
Sample and hold capability
Temperature sensor
up to 2 MSPS in interleaved mode

2 × 12-bit D/A converters
DMA: 12-channel DMA controller
Supported peripherals: timers, ADCs, DAC, I2Ss, SPIs, I2Cs and USARTs

Debug mode
Serial wire debug (SWD) & JTAG interfaces
Cortex?-M3 Embedded Trace Macrocell?

Up to 80 fast I/O ports
51/80 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant

CRC calculation unit, 96-bit unique ID
Up to 10 timers with pinout remap capability
Up to four 16-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
1 × 16-bit motor control PWM timer with dead-time generation and emergency stop
2 × watchdog timers (Independent and Window)
SysTick timer: a 24-bit downcounter
2 × 16-bit basic timers to drive the DAC

Up to 14 communication interfaces with pinout remap capability
Up to 2 × I2C interfaces (SMBus/PMBus)
Up to 5 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)
Up to 3 SPIs (18 Mbit/s), 2 with a multiplexed I2S interface that offers audio class accuracy via advanced PLL schemes
2 × CAN interfaces (2.0B Active) with 512 bytes of dedicated SRAM
USB 2.0 full-speed device/host/OTG controller with on-chip PHY that supports HNP/SRP/ID with 1.25 Kbytes of dedicated SRAM
10/100 Ethernet MAC with dedicated DMA and SRAM (4 Kbytes): IEEE1588 hardware support, MII/RMII available on all packages