32-bit MCU development and analysis design based on STM32F100VBT6

The STM32F100VBT6 uses the ARM Cortex™-M3 32-bit RISC core, operates at a frequency of 24MHz, integrates high-speed embedded memory (up to 128kB flash memory, up to 8kB SRAM) and various enhanced peripherals and I/O connected to two APB buses. All devices provide two I2C, two SPI, one HDMI CEC and up to 3 USART Peugeot communication interfaces as well as a 12-bit ADC, two 12-bit DACs and six general-purpose 16-bit timers and PWM timers. It is mainly used in control and user interfaces, medical equipment, PC and game console peripherals, GPS platforms, industrial applications, PLCs, inverters, printers, video communications, HVAC, etc.


Figure 1 STM32F100xx series block diagram

STM32F100xx Introduction

Low/medium density, ARM-based advanced 32-bit MCU with 16 kB ~128kBFlash, 12 timers, ADC, DAC and 8 communication interfaces The STM32F100xx series integrates a high-performance ARM Cortex™-M3 32-bit RISC core operating at 24MHz, high-speed embedded memory (up to 128kB flash, up to 8kB SRAM) and a variety of enhanced peripherals and I/O connected to two APB buses. All devices provide standard communication interfaces (2 I2C, 2 SPI, 1 HDMI CEC and 3 USARTs), 1 12-bit ADC, two 12-bit DACs, 6 general-purpose 16-bit timers and advanced control PWM timers.


Figure 2 Hardware block diagram of the STM32F100VBT6 evaluation board

The operating temperature range of the STM32F100xx low/medium density product series is –40~+85℃ and –40~+105℃, and the power supply voltage range is 2.0V~3.6V. Comprehensive power-saving modes enable low-power application design.

The STM32F100xx series devices are available in three different packages with 48 to 100 pins. Different devices come with different peripheral sets.

These features make the STM32F100xx series microcontrollers suitable for a wide range of applications, such as application control and user interface, medical and handheld equipment, PC and game console peripherals, GPS platforms, industrial applications, PLCs, inverters, printers, scanners, alarm systems, video communications and HVAC.


Figure 3 Circuit diagram of the STM32F100VBT6 evaluation board (1) [page]

STM32F100VBT6 Key Features

• Core: ARM 32-bit Cortex™-M3 CPU

– 24MHz maximum frequency and 1.25DMIPS/MHz (Dhrystone 2.1) performance

– Single-cycle multiplication and hardware division

• Memory

– 16 kB ~128kB Flash memory

– 4kB ~8kB SRAM

• Clock, reset and power management

– ​​2.0V~3.6V application power supply and I/O

– POR, PDR and programmable voltage detector (PVD)

– 4MHz~24MHz crystal oscillator

– Internal 8MHz factory pre-calibrated RC

– Internal 40kHz RC

– PLL for CPU clock

– 32kHz oscillator for RTC with calibration

• Low power consumption

– Sleep, stop and standby modes

– VBAT power supply for RTC and backup registers

• Debug mode

– Serial wire debug (SWD) and JTAG interface

• DMA

– 7-channel DMA controller

– Supported peripherals: timers, ADC, SPI, I2C, USART and DAC

• 1×12-bit, 1.2μs A/D converter (up to 16 channels)

– Conversion range: 0V~3.6V

– Temperature sensor

• 2×12-bit D/A converters

• Up to 80 fast I/O ports

– 37/51/80 I/Os, mappable on 16 external interrupt vectors, and almost all 5V tolerant

• Up to 12 timers

– Up to 3 16-bit timers, each with 4 IC/OC/PWM or pulse counters

– 16-bit, 6-channel advanced control timer: up to 6 channels, PWM output, dead time generation and emergency stop

– 1 16-bit timer with 2 IC/OC, 1 OCN/PWM, dead time generation and emergency stop functions

– 2 16-bit timers, each with IC/OC/OCN/PWM, dead time generation and emergency stop functions

– 2 watchdog timers (independent and Window)

– SysTick timer: 24-bit down counter

– 2 16-bit basic timers that can drive DAC

• Up to 8 communication interfaces

– Up to 2 I2C interfaces (SMBus/PMBus)

– Up to 3 USARTs (ISO 7816 interface, LIN, IrDA functionality, modem control)

– Up to 2 SPIs (12Mb/s)

– Consumer Electronics Control (CEC) interface

• CRC calculation unit, 96-bit unique ID

• ECOPACK® package

STM32100B-EVAL evaluation board

The STM32100B-EVAL is an evaluation board for STMicroelectronics’ ARMTM Cortex-M3-based STM32F100VBT6 microcontroller. It is designed as a comprehensive development environment with HDMI CEC, 2 I2C channels, 2 SPI channels, 3 USART channels, 8kB internal SRAM, 128kB internal Flash, and JTAG and SWD debugging support.

With a full set of hardware evaluation features, the STM32100B-EVAL evaluation board is designed to help developers evaluate all device peripherals (such as HDMI CEC, motor control, LCD, MicroSD Card™, Serial Flash, speaker, IrDA and USART) and develop their own applications. Expansion connectors allow easy connection of daughter boards or dedicated wraparound boards.

ST-LINK is integrated on the evaluation board, which can act as an embedded in-circuit debugger and programmer for the STM32F100VBT6 MCU.


Figure 4 STM32F100VBT6 evaluation board circuit diagram (2)

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Key features of the STM32100B-EVAL evaluation board

• 3 5V power supply options: power jack, ST-LINK connector or daughter board

• Boot from user Flash, system memory or SRAM

• Speaker

• 1GB MicroSD Card™

• 16MB serial Flash

• I2C/SMBus compatible serial interface temperature sensor

• 2 RS-232 communication channels with RTS/CTS handshake support on 1 channel

• IrDA transceiver

• Inductive motor control connector

• JTAG and SWD debugging support

• 240×320 TFT color LCD

• Joystick with four-way control and selector

• Reset, wake-up, tamper and user buttons

• 4 LEDs

• RTC with battery backup

• Expansion connector for daughter board or breakout board

• Embedded ST-LINK

• IDD current measurement circuit

• HDMI CEC

GEC