STMicroelectronics STM32100E-EVAL

Overview

STM32100E-EVAL from STMicroelectronics is an evaluation board built around the STM32F100RB microcontroller (ARM® Cortex-M3, 24 MHz, 128 KB Flash, 8 KB SRAM), featuring a 3.2" TFT LCD with touch screen, MicroSD card slot (≥1 GB), 16 MB serial Flash, 2 MB SRAM, 64 Kbit EEPROM, HDMI-CEC, RS-232/RS-485 interfaces, IrDA/IR receiver, motor control connector, and embedded ST-LINK/V2 debugger.

For engineers reviewing the STM32100E-EVAL datasheet, STM32100E-EVAL pinout, STM32100E-EVAL application, or STM32100E-EVAL equivalent, key selection considerations include on-board peripheral coverage (HDMI CEC, dual UART with hardware flow control, temperature sensor, RTC with battery backup), debug interface support (JTAG/SWD), and daughterboard extension capability for custom hardware integration.

Technical Context

The board implements a full-featured ARM Cortex-M3 development environment with integrated ST-LINK/V2, enabling in-circuit programming and real-time debugging via SWD or JTAG. It supports boot from user Flash, system memory, or SRAM - critical for firmware validation and bootloader development.

Hardware peripherals are directly mapped to the STM32F100RB's GPIOs and alternate functions: USART1 drives both RS-232 (with RTS/CTS) and shared RS-485; I²C bus connects to onboard temperature sensor and EEPROM; FSMC interface accesses external SRAM and serial Flash; and dedicated pins route to HDMI CEC, IrDA transceiver, and motor control header.

Key Specifications

Availability

STM32100E-EVAL is available at Aetrix Electronics and suitable for industrial HMI development, embedded motor control prototyping, consumer electronics AV interface validation, and educational ARM Cortex-M3 curriculum requiring stable component supply and full-featured evaluation platforms.

Supply support for STM32100E-EVAL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, analog ICs, power devices, and sensors for industrial, automotive, and consumer markets.

The STM32100E-EVAL belongs to ST's STM32 evaluation board family, engineered to accelerate firmware development and peripheral validation for entry-level Cortex-M3 MCUs in cost-sensitive, resource-constrained embedded systems.

FAQ

Does STM32100E-EVAL support SWD debugging without external tools?

Yes. The board integrates ST-LINK/V2 firmware on-chip, providing native Serial Wire Debug (SWD) connectivity via its micro-USB port. No external debugger is required - users can program and debug the STM32F100RB using STM32CubeIDE or Keil MDK with standard USB cable and ST's official drivers.

Can the RS-485 interface operate simultaneously with RS-232 on USART1?

No. RS-232 and RS-485 share the same USART1 peripheral and physical connector; they are mutually exclusive. Hardware jumpers determine which transceiver is enabled. Simultaneous operation requires remapping USART2 or using software bit-banging on GPIOs - not supported by default firmware.

Is the HDMI-CEC interface electrically compliant with IEC 62132-3?

Yes. The board implements HDMI-CEC per IEC 62132-3, using a dedicated CEC line driver (STDP2600 or equivalent) and 1:1 impedance-matched trace routing. It supports CEC logical addressing, message arbitration, and broadcast commands as defined in HDMI 1.3a specification.

What is the maximum clock frequency achievable on the STM32F100RB when running from internal RC oscillator?

The STM32F100RB achieves up to 24 MHz using its factory-trimmed 24 MHz HSI RC oscillator. No PLL multiplication is available on this device - unlike higher-end STM32F10x parts - so 24 MHz is the absolute maximum system clock without external crystal.